L-alanyl-L-serine + N-acetyl-L-methionine => N(alpha)-acetyl-L-methionyl-L-alanyl-L-serine + H2O
l-alanyl-l-serine + n-acetyl-l-methionine => n(alpha)-acetyl-l-methionyl-l-alanyl-l-serine + h2o
L-alanyl-L-serine + N-acetyl-L-methionine => N(alpha)-acetyl-L-methionyl-L-alanyl-L-serine + H2O
l-alanyl-l-serine + n-acetyl-l-methionine => n(alpha)-acetyl-l-methionyl-l-alanyl-l-serine + h2o