Exhibit 3.2

                                                                      AS AMENDED
                                                                         1/24/92

                                     BYLAWS
                                       OF
                           HELIX BIOCORE, INCORPORATED

                                   ARTICLE I.
                             OFFICES, CORPORATE SEAL


         Section 1.01. Registered Office. The registered office of the
corporation in Minnesota shall be that set forth in the Articles of
Incorporation or in the most recent amendment of the Articles of Incorporation
or resolution of the directors filed with the Secretary of State of Minnesota
changing the registered office.

         Section 1.02. Other Offices. The corporation may have such other
offices, within or without the State of Minnesota, as the directors shall, from
time to time, determine.

         Section 1.02. Corporate Seal. The corporation shall have no seal.

                                   ARTICLE II.
                            MEETINGS OF SHAREHOLDERS

         Section 2.01. Place and Time of Meetings. Except as provided otherwise
by Minnesota Statutes Chapter 302A, meetings of the shareholders may be held at
any place, within or without the State of Minnesota, as may from time to time be
designated by the directors and, in the absence of such designation, shall be
held at the registered office of the corporation in the State of Minnesota. The
directors shall designate the time of day for each meeting and, in the absence
of such designation, every meeting of shareholders shall be held at ten o'clock
a.m.

         Section 2.02.  Regular Meetings.

         (a) A regular meeting of the shareholders shall be held on such date as
the Board of Directors shall by resolution establish.

         (b) At a regular meeting the shareholders, voting as provided in the
Articles of Incorporation and these Bylaws, shall designate the number of
directors to constitute the Board of Directors (subject to the authority of the
Board of Directors thereafter to increase or decrease the number of directors as
permitted by law), shall elect qualified successors for directors who serve for
an indefinite term or whose terms have expired or are due to expire within six
months after the date of the meeting and shall transact such other business as
may properly come before them.

         Section 2.03. Special Meetings. Special meetings of the shareholders
may be held at any time and for any purpose and may be called by the President,
Treasurer, any two or more directors, or by one or more shareholders holding 10%
or more of the shares entitled to vote on the matters to be presented to the
meeting.

         Section 2.04. Quorum, Adjourned Meetings. The holders of a majority of
the shares entitled to vote shall constitute a quorum for the transaction of
business at any regular or special meeting. In case a quorum shall not be
present at a meeting, those present may adjourn the meeting to such day as they
shall, by majority vote, agree upon, and a notice of such adjournment and the
date and time at which such meeting shall be reconvened shall be mailed to each
shareholders entitled to vote at least 5 days before such reconvened meeting. If
a quorum is present, a meeting may be adjourned from time to time without notice
other than announcement at the meeting. At adjourned meetings at which a quorum
is present, any business may be transacted which might have been transacted at
the meeting as originally noticed. If a quorum is present, the shareholders may
continue to transact business until adjournment notwithstanding of the
withdrawal of enough shareholders to leave less than a quorum.

         Section 2.05. Voting. At each meeting of the shareholders every
shareholder having the right to vote shall be entitled to vote either in person
or by proxy. Each shareholder, unless the Articles of Incorporation or statute
provide otherwise, shall have one vote for each share having voting power
registered in such shareholder's name on the books of the corporation. Jointly
owned shares may be voted by any joint owner unless the corporation receives
written notice from any one of them denying the authority of that person to vote
those shares. Upon the demand of any shareholder, the vote upon any question
before the meeting shall be by ballot. All questions shall be decided by a
majority vote of the number of shares entitled to vote and represented at the
meeting at the time of the vote except if otherwise required by statute, the
Articles of Incorporation, or these Bylaws.

         Section 2.06. Closing of Books. The Board of Directors may fix a time,
not exceeding 60 days preceding the date of any meeting of shareholders, as a
record date for the determination of the shareholders entitled to notice of, and
to vote at, such meeting, notwithstanding any transfer of shares on the books of
the corporation after any record date so fixed. The Board of Directors may close
the books of the corporation against the transfer of shares during the whole or
any part of such period. If the Board of Directors fails to fix a record date
for determination of the shareholders entitled to notice of, and to vote at, any
meeting of shareholders, the record date shall be the 20th day of preceding the
date of such meeting.

         Section 2.07. Notice of Meetings. There shall be mailed to each
shareholder, shown by the books of the corporation to be a holder of record of
voting shares, at his address as shown by the books of the corporation, a notice
setting out the time and place of each regular meeting and each special meeting,
except where the meeting is an adjourned meeting and the date, time and place of
the meeting were announced at the time of adjournment, which notice shall be
mailed to all shareholders of record, whether entitled to vote or not, at least
fourteen days prior thereto. Every notice of any special meeting called pursuant
to Section 2.03 hereof shall state the purpose or purposes for which the meeting
has been called, and the business transacted at all special meetings shall be
confined to the purpose stated in the notice.

         Section 2.08. Waiver of Notice. Notice of any regular or special
meeting may be waived by any shareholder either before, at or after such meeting
orally or in writing signed by such shareholder or a representative entitled to
vote the shares of such shareholder. A shareholder, by his attendance at any
meeting of shareholders, shall be deemed to have waived notice of such meeting,
except where the shareholder objects at the beginning of the meeting to the
transaction of business because the time may not lawfully be considered at that
meeting and does not participate in the consideration of the item at that
meeting.

         Section 2.09. Written Action. Any action which might be taken at a
meeting of the shareholders may be taken without a meeting if done in writing
and signed by all of the shareholders entitled to vote on that action.

                                  ARTICLE III.
                                    DIRECTORS

         Section 3.01. General Powers. The business and affairs of the
corporation shall be managed by or under the authority of the Board of
Directors, except as otherwise permitted by statute.

         Section 3.02. Number, Qualification and Term of Office. Until the first
meeting of shareholders, the number of directors shall be the number named in
the Articles of Incorporation or, if no such number is named therein, the number
elected by the incorporator. Thereafter, the number of directors shall be
established by resolution of the shareholders (subject to the authority of the
Board of Directors to increase or decrease the number of directors as permitted
by law). In the absence of such shareholder resolution, the number of directors
shall be the number last fixed by the shareholders, the Board of Directors, the
incorporator or the Articles of Incorporation. Directors need not be
shareholders. Each of the directors shall hold office until the regular meeting
of shareholders next held after such director's election and until such
director's successor shall have been elected and shall qualify, or until the
earlier death, resignation, removal, or disqualification of such director;
provided, however, that no director shall be elected to a term in excess of five
years.

         Section 3.03. Board Meetings. Meetings of the Board of Directors may be
held from time to time at such time and place within or without the State of
Minnesota as may be designated in the notice of such meeting.

         Section 3.04. Calling Meetings; Notice. Meetings of the Board of
Directors may be called by the Chairman of the Board by giving at least
twenty-four hours' notice, or by any other director by giving at least five
days' notice, of the date, time and place thereof to each director by mail,
telephone, telegram or in person.

         Section 3.05. Waiver of Notice. Notice of any meeting of the Board of
Directors may be waived by any director either before, at, or after such meeting
orally or in a writing signed by such director. A director, by his attendance at
any meeting of the Board of Directors, shall be deemed to have waived notice of
such meeting, except where the director objects at the beginning of the meeting
to the transaction of business because the meeting is not lawfully called or
convened and does not participate thereafter in the meeting.

         Section 3.06. Quorum. A majority of the directors holding office
immediately prior to a meeting of the Board of Directors shall constitute a
quorum for the transaction of business at such meeting.

         Section 3.07. Absent Directors. A director may give advance written
consent or opposition to a proposal to be acted on at a meeting of the Board of
Directors. If such director is not present at the meeting, consent or opposition
to a proposal does not constitute presence for purposes of determining the
existence of a quorum, but consent or opposition shall be counted as a vote in
favor of or against the proposal and shall be entered in the minutes or other
record of action at the meeting, if the proposal acted on at the meeting is
substantially the same or has substantially the same effect as the proposal to
which the director has consented or objected.

         Section 3.08. Conference Communications. Any or all directors may
participate in any meeting of the Board of Directors, or of any duly constituted
committee thereof, by any means of communication through which the directors may
simultaneously hear each other during such meeting. For the purposes of
establishing a quorum and taking any action at the meeting, such directors
participating pursuant to this Section 3.08 shall be deemed present in person at
the meeting; and the place of the meeting shall be the place of origination of
the conference telephone conversation or other comparable communication
technique.

         Section 3.09. Vacancies; Newly Created Directorships. Vacancies in the
Board of Directors of this corporation occurring by reason of death, or
resignation, removal or disqualification shall be filled for the unexpired term
by a majority of the remaining directors of the Board although less than a
quorum; newly created directorships resulting from an increase in the authorized
number of directors by action of the Board of Directors as permitted by Section
3.02 may be filled by a majority vote of the directors serving at the time of
such increase; and each director elected pursuant to this Section 3.09 shall be
a director until such director's successor is elected by the shareholders at
their next regular or special meeting.

         Section 3.10. Removal. Any or all of the directors may be removed from
office at any time, with or without cause, by the affirmative vote of the
shareholders holding a majority of the shares entitled to vote at an election of
directors except, as otherwise provided by Minnesota Statutes Section 302A.223,
as amended, when the shareholders have the right to cumulate their votes. A
director named by the Board of Directors to fill a vacancy may be removed from
office at any time, with or without cause, by the affirmative vote of the
remaining directors if the shareholders have not elected directors in the
interim between the time of the appointment to fill such vacancy and the time of
the removal. In the event that the entire Board or any one or more directors be
so removed, new directors shall be elected at the same meeting.

         In addition to the foregoing, any director may be removed at any time
by the affirmative vote of a majority of the remaining directors if the
remaining directors determine that the director to be removed is engaged in an
activity that is competitive with any business of the Company. A director may be
determined to be engaged in an activity if he or she is an employee, director,
partner, consultant, owner, representative, agent or shareholder (other than a
shareholder beneficially owning less than 1% of the outstanding stock) of a
company, partnership, sole proprietorship or other organization. An activity may
be deemed to be competitive with the Company if the product or service created
by the activity is the same as or an alternative to any of the products or
services of the Company. The Board of Directors shall determine whether a
director is engaged in a competitive activity utilizing the guidelines described
in the previous two sentences as well as any other guidelines it determines to
be relevant. The Board's decision shall not be overturned by any court unless
the decision is shown to be clearly erroneous.

         Section 3.11. Committees. A resolution approved by the affirmative vote
of a majority of the Board of Directors may establish committees having the
authority of the board in the management of the business of the corporation to
the extent provided in the resolution. A committee shall consist of one or more
persons, who need not be directors, appointed by affirmative vote of a majority
of the directors present. Committees are subject to the direction and control
of, and vacancies in the membership thereof shall be filled by, the Board of
Directors, except as provided by Minnesota Statutes Section 302A.243.

         A majority of the members of the committee present at a meeting is a
quorum for the transaction of business, unless a larger or small proportion or
number is provided in a resolution approved by the affirmative vote of a
majority of the directors present.

         Section 3.12. Written Action. Any action which might be taken at a
meeting of the Board of Directors, or any duly constituted committee thereof,
may be taken without a meeting if done in writing and signed by all of the
directors or committee members, unless the Articles provide otherwise and the
action need not be approved by the shareholders.

         Section 3.13. Compensation. Directors who are not salaried officers of
this corporation shall receive such fixed sum per meeting attended or such fixed
annual sum as shall be determined, from time to time, by resolution of the Board
of Directors. The Board of Directors may, by resolution, provide that all
directors shall receive their expenses, if any, of attendance at meetings of the
Board of Directors or any committee thereof. Nothing herein contained shall be
construed to preclude any director from serving this corporation in any other
capacity and receiving proper compensation therefor.

                                   ARTICLE IV.
                                    OFFICERS

         Section 4.01. Number. The officers of the corporation shall consist of
a Chairman of the Board (if one is elected by the Board), the President, one or
more Vice Presidents (if desired by the Board), a Treasurer, a Secretary (if one
is elected by the Board) and such other officers and agents as may, from time to
time be elected by the Board of Directors. Any number of offices may be held by
the same person.

         Section 4.02. Election Term of Office and Qualifications. The Board of
Directors shall elect or appoint, by resolution approved by the affirmative vote
of a majority of the directors present, from within or without their number, the
President, Treasurer and such other officers as may be deemed advisable, each of
whom shall have the powers, rights, duties, responsibilities, and terms in
office provided for in these Bylaws or a resolution of the Board of Directors
not inconsistent therewith. The President and all other officers who may be
directors shall continue to hold office until the election and qualification of
their successors, notwithstanding an earlier termination of their directorship.

         Section 4.03. Removal and Vacancies. Any officer may be removed from
his office by the Board of Directors at any time, with or without cause. Such
removal, however, shall be without prejudice to the contract rights of the
person so removed. If there be a vacancy among the officers of the corporation
by reason of death, resignation or otherwise, such vacancy shall be filled for
the unexpired term by the Board of Directors.

         Section 4.04. Chairman of the Board. The Chairman of the Board, if one
is elected, shall preside at all meetings of the shareholders and directors and
shall have such other duties as may be prescribed, from time to time, by the
Board of Directors.

         Section 4.05. President. The President shall be the chief executive
officer and shall have general active management of the business of the
corporation. In the absence of the Chairman of the Board, he shall preside at
all meetings of the shareholders and directors. He shall see that all orders and
resolutions of the Board of Directors are carried into effect. He shall execute
and deliver, in the name of the corporation, any deeds, mortgages, bonds,
contracts or other instruments pertaining to the business of the corporation
unless the authority to execute and deliver is required by law to be exercised
by another person or is expressly delegated by the Articles or Bylaws or by the
Board of Directors to some other officer or agent of the corporation. He shall
maintain records of and, whenever necessary, certify all proceedings of the
Board of Directors and the shareholders, and in general, shall perform all
duties usually incident to the office of the President. He shall have such other
duties as may, from time to time, be prescribed by the Board of Directors.

         Section 4.06. Vice President. Each Vice President, if one or more are
elected, shall have such powers and shall perform such duties as prescribed by
the Board of Directors or by the President. In the event of the absence or
disability of the President, the Vice President(s) shall succeed to his power
and duties in the order designed by the Board of Directors.

         Section 4.07. Secretary. The Secretary, if one is elected, shall be
secretary of and shall attend all meetings of the shareholders and Board of
Directors and shall record all proceedings of such meetings in the minute book
of the corporation. He shall give proper notice of meetings of shareholders and
directors. He shall perform such other duties as may, from time to time, be
prescribed by the Board of Directors or by the President.

         Section 4.08. Treasurer. The Treasurer shall be the chief financial
officer and shall keep accurate financial records for the corporation. He shall
deposit all moneys, drafts and checks in the name of, and to the credit of, the
corporation in such banks and depositaries as the Board of Directors shall, from
time to time, designate. He shall have power to endorse, for deposit, all notes,
checks and drafts received by the corporation. He shall disburse the funds of
the corporation, as ordered by the Board of Directors, making proper vouchers
therefor. He shall render to the President and the directors, whenever
requested, an account of all his transactions as Treasurer and of the financial
condition of the corporation, and shall perform such other duties as may, from
time to time, be prescribed by the Board of Directors or by the President.

         Section 4.09. Compensation. The officers of this corporation shall
receive such compensation for their services as may be determined, from time to
time, by resolution of the Board of Directors.

                                   ARTICLE V.
                            SHARES AND THEIR TRANSFER

         Section 5.01. Certificates for Shares. All shares of the corporation
shall be certificated shares. Every owner of shares of the corporation shall be
entitled to a certificate, to be in such form as shall be prescribed by the
Board of Directors, certifying the number of shares of the corporation owned by
such shareholder. The certificates for such shares shall be numbered in the
order in which they shall be issued and shall be signed, in the name of the
corporation, by the President and by the Secretary or an Assistant Secretary or
by such officers as the Board of Directors may designate. If the certificate is
signed by a transfer agent or registrar, such signatures of the corporate
officers may be by facsimile if authorized by the Board of Directors. Every
certificate surrendered to the corporation for exchange or transfer shall be
canceled, and no new certificate or certificates shall be issued in exchange for
any existing certificate until such existing certificate shall have been so
canceled, except in cases provided for in Section 5.04.

         Section 5.02 Issuance of Shares. The Board of Directors is authorized
to cause to be issued shares of the corporation up to the full amount authorized
by the Articles of Incorporation in such amounts as may be determined by the
Board of Directors and as may be permitted by law. No shares shall be allotted
except in consideration of cash or other property, tangible or intangible,
received or to be received by the corporation under a written agreement, of
services rendered or to be rendered to the corporation under a written
agreement, or of an amount transferred from surplus to state capital upon a
share dividend. At the time of such allotment of shares, the Board of Directors
making such allotments shall state, by resolution, their determination of the
fair value to the corporation in monetary terms of any consideration other than
cash for which shares are allotted.

         Section 5.03 Transfer of Shares. Transfer of shares on the books of the
corporation may be authorized only by the shareholder named in the certificate,
or the shareholder's legal representative, or the shareholder's duly authorized
attorney- in-fact, and upon surrender of the certificate or the certificates for
such shares. The corporation may treat as the absolute owner of shares of the
corporation, the person or persons in whose name shares are registered on the
books of the corporation.

         Section 5.04. Loss of Certificates. Except as otherwise provided by
Minnesota Statutes Section 302A.419, any shareholder claiming a certificate for
shares to be lost, stolen, or destroyed shall make an affidavit of that fact in
such form as the Board of Directors shall require and shall, if the Board of
Directors so requires, give the corporation a bond of indemnity in form, in an
amount, and with one or more sureties satisfactory to the Board of Directors, to
indemnify the corporation against any claim which may be made against it on
account of the reissue of such certificate, whereupon a new certificate may be
issued in the same tenor and for the same number of shares as the one alleged to
have been lost, stolen or destroyed.

                                   ARTICLE VI.
                             DIVIDENDS, RECORD DATE

         Section 6.01. Dividends. Subject to the provisions of the Articles of
Incorporation, of these Bylaws, and of law, the Board of Directors may declare
dividends whenever, and in such amounts as, in its opinion, are deemed
advisable.

         Section 6.02 Record Date. Subject to any provisions of the Articles of
Incorporation, the Board of Directors may fix a date not exceeding 120 days
preceding the date fixed for the payment of any dividend as the record date for
the determination of the shareholders entitled to receive payment of the
dividend and, in such case, only shareholders of record on the date so fixed
shall be entitled to receive payment of such dividend notwithstanding any
transfer of shares on the books of the corporation after the record date. The
Board of Directors may close the books of the corporation against the transfer
of shares during the whole or any part of such period.

                                  ARTICLE VII .
                         BOOKS AND RECORDS, FISCAL YEAR

         Section 7.01. Share Register. The Board of Directors of the corporation
shall cause to be kept at its principal executive office, or at another place or
places within the United States determined by the board:

         (1)      a share register not more than one year old, containing the
                  names and addresses of the shareholders and the number and
                  classes of shares held by each shareholder; and

         (2)      a record of the dates on which certificates or transaction
                  statements representing shares were issued.

         Section 7.02. Other Books and Records. The Board of Directors shall
cause to be kept at its principal executive office, or, if its principal
executive office is not in Minnesota, shall make available at its registered
office within ten days after receipt by an officer of the corporation of a
written demand for them made by a shareholder or other person authorized by
Minnesota Statutes Section 302A.461, originals or copies of:

         (1)      records of all proceedings of shareholders for the last three
                  years;

         (2)      records of all proceedings of the board for the last three
                  years;

         (3)      its articles and all amendments currently in effect;

         (4)      its bylaws and all amendments currently in effect;

         (5)      financial statements required by Minnesota Statutes Section
                  302A.463 and the financial statements for the most recent
                  interim period prepared in the course of the operation of the
                  corporation for distribution to the shareholders or to a
                  governmental agency as a matter of public records;

         (6)      reports made to shareholders generally within the last three
                  years;

         (7)      a statement of the names and usual business addresses of its
                  directors and principal officers;

         (8)      any shareholder voting or control agreements of which the
                  corporation is aware; and

         (9)      such other records and books of account as shall be necessary
                  and appropriate to the conduct of the corporate business.

         Section 7.03. Fiscal Year. The fiscal year of the corporation shall be
determined by the Board of Directors.

                                  ARTICLE VIII.
                          LOANS, GUARANTEES, SURETYSHIP

         Section 8.01. The corporation may lend money to, guarantee an
obligation of, become a surety for, or otherwise financially assist a person if
the transaction, or a class of transactions to which the transaction belongs, is
approved by the affirmative vote of a majority of the directors present, and:

         (1)      is in the usual and regular course of business of the
                  corporation;

         (2)      is with, or for the benefit of, a related corporation, and
                  organization in which the corporation has a financial
                  interest, an organization with which the corporation has a
                  business relationship, or an organization to which the
                  corporation has the power to make donations;

         (3)      is with, or for the benefit of, an officer or other employee
                  of the corporation or a subsidiary, including an officer or
                  employee who is a director of the corporation or a subsidiary,
                  and may reasonably be expected, in the judgment of the board,
                  to benefit the corporation; or

         (4)      has been approved by the affirmative vote of the holders of
                  two-thirds of the outstanding shares.

The loan, guarantee, surety contract or other financial assistance may be with
or without interest, and may be unsecured, or may be secured in the manner as a
majority of the directors approve, including, without limitation, a pledge of or
other security interest in shares of the corporation. Nothing in this section
shall be deemed to deny, limit or restrict the power of guaranty or warranty of
the corporation at common law or under a statute of the State of Minnesota.

                                   ARTICLE IX.
                       INDEMNIFICATION OF CERTAIN PERSONS

         Section 9.01. The corporation shall indemnify such persons, for such
expenses and liabilities, in such manner, under such circumstances, and to such
extent as permitted by Minnesota Statutes Section 302A.521, as now enacted or
hereafter amended.

                                   ARTICLE X.
                                   AMENDMENTS

         Section 10.01. These Bylaws may be amended or altered by a vote of the
majority of the whole Board of Directors at any meeting, provided that notice of
such proposed amendment shall have been given in the notice given to the
directors of such meeting. Such authority in the Board of Directors is subject
to the power of the shareholders to change or repeal such Bylaws by a majority
vote of the shareholders present or represented at any regular or special
meeting of shareholders called for such purpose, and the Board of Directors
shall not make or alter any Bylaws fixing a quorum for meetings of shareholders,
prescribing procedures for removing directors or filling vacancies in the Board
of Directors, or fixing the number of directors or their classifications,
qualifications, or terms of office, except that the Board of Directors may adopt
or amend any Bylaw to increase their number.

                                   ARTICLE XI.
                        SECURITIES OF OTHER CORPORATIONS

         Section 11.01. Voting Securities Held by the Corporation. Unless
otherwise ordered by the Board of Directors, the President shall have full power
and authority on behalf of the corporation (a) to attend any meeting of security
holders of other corporations in which the corporation may hold securities and
to vote such securities on behalf of this corporation; (b) to execute any proxy
for such meeting on behalf of the corporation; or (c) to execute a written
action in lieu of a meeting of such other corporation on behalf of this
corporation. At such meeting, the president shall possess and may exercise any
and all rights and power incident to the ownership of such securities that the
corporation possesses. The Board of Directors may, from time to time, grant such
power and authority to one or more other persons and may remove such power and
authority from the President or from any such other person or persons.

         Section 11.02. Purchase and Sale of Securities. Unless otherwise
ordered by the Board of Directors, the President shall have full power and
authority on behalf of the corporation to purchase, sell, transfer or encumber
any and all securities of any other corporation owned by the corporation, and
may execute and deliver such documents as may be necessary to effectuate such
purchase, sale, transfer or encumbrance. The Board of Directors may, from time
to time, confer like powers upon any other person or persons.