Jeffrey L. Stein, Ph.D. has served as a member of our board of directors since October 2015. Dr. Stein was the President and Chief Executive Officer of Cidara Therapeutics, Inc., a biotechnology company, from 2014 until its acquisition by Merck in January 2026. Prior to joining Cidara, Dr. Stein was the President and Chief Executive Officer of Trius Therapeutics, Inc. from 2007 until its acquisition by Cubist Pharmaceuticals, Inc. in September 2013. Dr. Stein was also a venture partner at Sofinnova Ventures, a biotech venture capital fund, from 2005 to 2010. Prior to joining Sofinnova, Dr. Stein was co-founder and Chief Scientific Officer at Quorex Pharmaceuticals, Inc., from 1999 until its acquisition by Pfizer in 2005. He has also served as a Principal Scientist with Diversa, Inc. and The Agouron Institute. Dr. Stein previously served on the board of directors of Paratek Pharmaceuticals, Inc., a biopharmaceutical company. Dr. Stein holds a Ph.D. in Marine Biology from the University of California, San Diego. Dr. Stein conducted his postdoctoral research in bacterial genetics as an Alexander Hollaender Distinguished Postdoctoral Fellow at the California Institute of Technology. Dr. Stein obtained a B.S. in Marine Biology and an M.S. in Biology from California State University, Long Beach. We believe Dr. Stein is qualified to serve on our board of directors due to his expertise, perspective and experience as a founder and executive at public and private pharmaceutical companies, and his expertise in life sciences and venture capital industries.