Richard Scheller, Ph.D. has served as a member of our board of directors since June 2019. Dr. Scheller is currently the Chair of Research and Development at BridgeBio Pharma Inc., a biotechnology company, a role he has served since January 2019, and served as a member of its board of directors from January 2018 to February 2021. He was previously the Head of Therapeutics and Chief Scientific Officer at 23andMe, Inc., a personal genomics company, from 2015 to 2019 and since early 2019 has served on that company s board of directors. He also serves on the board of directors of Alector, Inc. From 2001 to 2014, Dr. Scheller spent 14 years at Genentech, a biotechnology company, where he was Executive Vice President of Research and Early Development. From 1982 to 2001, Dr. Scheller served on the faculty of Stanford University as a professor in the Department of Biological Sciences and the Department of Molecular and Cellular Physiology and was an investigator at the Howard Hughes Medical Institute of Stanford University Medical Center. Since 2004, Dr. Scheller has served as an adjunct professor in the Department of Biochemistry and Biophysics at the University of California, San Francisco. He has published more than 200 primary research papers during his career. Dr. Scheller received the Kavli Prize in Neuroscience (2010) and is a Member of the National Academy of Sciences and the National Academy of Medicine. Dr. Scheller received a Ph.D. in Chemistry from California Institute of Technology and a B.S. in Biochemistry from the University of Wisconsin-Madison. We believe Dr. Scheller is qualified to serve on our board of directors based on his significant experience building and leading successful biotechnology companies and his scientific expertise.