Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series C Convertible Preferred Stock^F3,F1	—	Nov 20, 2017	C	207,253	D	—	—	Common Stock	103,278	0	D
Series D Convertible Preferred Stock^F3,F2	—	Nov 20, 2017	C	843,613	D	—	—	Common Stock	247,176	0	D

Explanation of responses

F1The Series C Convertible Preferred Stock converted into Common Stock on a 0.49832-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series C Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing at the Issuer's initial public offering. The shares had no expiration date.
F2The Series D Convertible Preferred Stock converted into Common Stock on a 0.29300-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series D Convertible Preferred Stock was convertible at any time at the holder's election and automatically upon the closing at the Issuer's initial public offering. The shares had no expiration date.
F3The reported securities are held of record by EMBL Technology Fund II GmbH & Co. KG ("EMBL"). EMBL Ventures Verwaltungs GmbH is the general partner of EMBL. Dr. Jan Adams, Dr. Frank Muhlenbeck and Dr. Stefan Herr are the Managing Directors of EMBL Ventures Verwaltungs GmbH. By virtue of such relationships, EMBL Ventures Verwaltungs GmbH, Dr. Adams, Dr. Frank Muhlenbeck and Dr. Herr may be deemed to have voting and investment power with respect to the securities held by EMBL. Each of EMBL Ventures Verwaltungs GmbH, Dr. Adams, Dr. Frank Muhlenbeck and Dr. Herr disclaims beneficial ownership of these securities and this report shall not be deemed to be an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or any other purpose, except to the extent of their pecuniary interest therein.