L-Threonine, L-alanylglycyl-L-prolyl-L-seryl-L-alanyl-L-valyl-L-prolyl-L-leucylglycyl-L-threon yl-L-alanylglycyl-L-asparaginyl-L-tyrosyl-L-valyl-L-isoleucyl-L-leucyl-L-alanyl -L-seryl-