Yuan Xu, Ph.D. has served as a director since August 2021. She has served as an independent director on the board of directors of Akero Therapeutics, Inc. (Nasdaq: AKRO) from April 2021 until its acquisition by Novo Nordisk in December 2025, and as an independent director on the board of directors of Xilio Therapeutics, Inc. (Nasdaq: XLO), a biotechnology company, since January 2022. Previously, she served as a board member and Chief Executive Officer of Legend Biotech Co. (Nasdaq: LEGN) from March 2018 to August 2020, playing a leading role in its initial public offering. Dr. Xu s prior career as a senior executive includes Senior Vice President leading Merck s Biologics & Vaccines Division from August 2015 to August 2017, as well as leading biopharmaceutical development and manufacturing groups for Gilead, Novartis and GlaxoSmithKline. In her early career, Dr. Xu held various scientific, regulatory and operations roles at Amgen, Chiron and Genentech. Dr. Xu received a B.S. in biochemistry from Nanjing University and a Ph.D. in biochemistry from the University of Maryland, and she completed her postdoctoral training in virology and gene therapy at the University of California, San Diego. The Board of Directors has determined that Dr. Xu is qualified to serve on our Board of Directors due to her long-standing track record of executive and scientific leadership in biopharmaceutical research, development, manufacturing, commercialization and life-cycle management.