>2vjz_A: INSULIN A CHAIN GIVEQCCTSICSLYQLENYCN >2vjz_B: INSULIN B CHAIN FVNQHLCGSHLVEALYLVCGERGFFYTPKT >2vjz_C: INSULIN A CHAIN GIVEQCCTSICSLYQLENYCN >2vjz_D: INSULIN B CHAIN FVNQHLCGSHLVEALYLVCGERGFFYTPKT