>3zu1_A mol:protein length:21 INSULIN A CHAIN GIVEQCCTSICSLYQLENYCN >3zu1_B mol:protein length:30 INSULIN B CHAIN FVNQHLCGSHLVEALYLVCGERGFFYTPKT >3zu1_D mol:protein length:30 INSULIN B CHAIN FVNQHLCGSHLVEALYLVCGERGFFYTPKT >3zu1_C mol:protein length:21 INSULIN A CHAIN GIVEQCCTSICSLYQLENYCN >3zu1_D mol:protein length:30 INSULIN B CHAIN FVNQHLCGSHLVEALYLVCGERGFFYTPKT