Gly Ile Gly Asp Pro Val Thr Cys Leu Lys Ser Gly Ala Ile Cys His
Pro Val Phe Cys Pro Arg Arg Tyr Lys Gln Ile Gly Thr Cys Gly Leu
Pro Gly Thr Lys Cys Cys Lys Lys Pro
(Disulfide bridge: 8-37; 15-30; 20-38)