CH3 H,C H C OH OH OH NH, NH> NH> Val Leu Ile OH H.C HC-S OH OH NH> NH2 NH2 Thr Met Lys OH OH NH> Phe NH2 TrpNH2 H3 C CH3 O OH NH2 O H3 C CH3 OH NH2 O H3 C CH3 OH NH2 H3 C OH O OH NH2 O S H3 C OH NH2 H2 N O OH NH2 O OH NH2 O N H OH Val Leu Ile Thr Met Lys Phe Trp