L-Isoleucine, L-methionyl-L-a-glutamylglycylglycyl-L-serylglycyl-L-histidyl-L-threonyl-L-val yl-L-threonylglycyl-L-asparaginyl-L-isoleucyl-L-a-aspartyl-L-histidyl-L-phen ylalanyl-L-phenylalanyl-L-s