L-Alanine, glycyl-L-cysteinyl-L-cysteinyl-L-alanyl-L-cysteinyl-L-threonylglycyl-L-threonyl -L-cysteinyl-L-cysteinyl-L-alanyl-L-cysteinyl-L-alanyl-L-cysteinyl-L-alanylglyc yl-L-cysteinyl-L-threonyl-