N(epsilon)-(5'-guanylyl)-N(alpha)-acetyl-L-lysine methyl ester + H2O => N(alpha)-acetyl-L-lysine methyl ester + GMP
n(epsilon)-(5'-guanylyl)-n(alpha)-acetyl-l-lysine methyl ester + h2o => n(alpha)-acetyl-l-lysine methyl ester + gmp