POWERS OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below hereby constitutes and appoints Mark McDonnell his or its true and lawful attorney-in-fact, with full power of substitution, to sign any and all instruments, certificates and documents that may be necessary, desirable or appropriate to be executed on behalf of himself as an individual or in his capacity as a direct or indirect general partner, member, director, officer or manager of any partnership, corporation or limited liability company, pursuant to section 13 or 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and any and all regulations promulgated thereunder, and to file the same, with all exhibits thereto, and any other documents in connection therewith, with the Securities and Exchange Commission, and with any other entity when and if such is mandated by the Exchange Act or by the Financial Industry Regulatory Authority, granting unto said attorney-in-fact full power and authority to do and perform each and every act and thing necessary, desirable or appropriate, fully to all intents and purposes as he might or could do in person, thereby ratifying and confirming all that said attorney-in-fact, or his substitutes, may lawfully do or cause to be done by virtue hereof. This Power of Attorney shall remain in full force and effect with respect to each undersigned person unless and until six months after such person is both no longer a Managing Director of ARCH Venture Partners and no longer serving on the board of directors of any portfolio company of any ARCH Venture Partners fund. IN WITNESS WHEREOF, this Power of Attorney has been signed as of the 21th day of February, 2019. ARCH VENTURE FUND X, L.P. By: ARCH Venture Partners X, L.P. its General Partner By: ARCH Venture Partners X, LLC its General Partner By: /s/ Keith Crandell Managing Director ARCH VENTURE PARTNERS X, L.P. By: ARCH Venture Partners X, LLC its General Partner By: /s/ Keith Crandell Managing Director ARCH VENTURE FUND X OVERAGE, L.P. By: ARCH Venture Partners X Overage, L.P. its General Partner By: ARCH Venture Partners X, LLC its General Partner By: /s/ Keith Crandell Managing Director ARCH VENTURE PARTNERS X OVERAGE, L.P. By: ARCH Venture Partners X, LLC its General Partner By: /s/ Keith Crandell Managing Director ARCH VENTURE PARTNERS X, LLC By: /s/Keith Crandell Managing Director /s/ Keith Crandell Keith Crandell /s/ Kristina Burow Kristina Burow /s/ Robert Nelsen Robert Nelsen /s/ Steven Gillis Steven Gillis
Burow Kristina
Filed: 26 Feb 19, 9:03pm