NEWARK, Calif.: NEWARK, Calif., Sept. 7, 2021 /PRNewswire/ -- Protagonist Therapeutics, Inc. (Nasdaq: PTGX) ("Protagonist" or "the Company") today announced the appointment of Scott Plevy, M.D., to the role of Executive Vice President and Therapeutic Head, Gastroenterology. Dr. Plevy will oversee clinical operations and development of Protagonist's ongoing and future...