aTyr Pharma 8-K Entry into a Material Definitive Agreement

Exhibit 99.2

MID-TERM COMPENSATION PLAN (MTIP)

• The purpose of MTIP:

• (1) Focus executives on aggressive mid-term strategic goals;

• (2) provide a performance-based opportunity to earn shares of Company stock.

• Awards are tied to achievement of the three-year strategic plan created in 2004, with target awards equal to each individual’s 2004 target ICP percentage.

• Effective annual award equal to 16.67% of base earnings

• Earned awards will be paid 50% in cash and 50% in restricted stock units

• Restricted stock units vest 100% three years after they are earned

• Awards are based 50% on three-year average revenue growth and 50% on achievement of cumulative free-cash-flow-return-on-average-capital-employed (i.e., cumulative free cash flow ÷ weighted avg. equity + debt).

			Company Performance Goals for the Period 1/1/04 to 12/31/06
Performance Measures	Weight		Threshold		Target		Maximum
Three-year Average Revenue Growth	50	%	*	*	*	*	*	*
Cumulative % Free-Cash-Flow-Return-on-Average-Capital-Employed	50	%	*	*	*	*	*	*
Potential Payout as % of Target	100	%	50	%	100	%	200	%

** Specific financial targets set by the Board

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