L-Serine, L-alanyl-L-a-glutamyl-L-alanyl-L-a-glutamyl-L-alanyl-L-lysyl-L-alanyl-L-lysyl-L -alanyl-L-a-glutamyl-L-alanyl-L-a-glutamyl-L-alanyl-L-lysyl-L-alanyl-L-lysyl-L- arginylglycyl-L-a-aspartyl-