Home › Authors › Udenfriend, Sidney, Jr. 👤 Udenfriend, Sidney, Jr. 2 books Books by Udenfriend, Sidney, Jr. Conformation in Biology and Dr Conformation in Biology and Drug Design : The Peptides 2014 Opioid Peptides : Biology, Che Opioid Peptides : Biology, Chemistry, and Genetics : The Peptides 2014