label: a 5'-end (N(2),N(2),N(7)-trimethyl 5'-triphosphoguanosine)-ribonucleoside in mRNA + H2O <=> (N(2),N(2),N(7))-trimethyl-GMP + a 5'-end diphospho-ribonucleoside in mRNA + 2 H(+)
label_lc: a 5'-end (n(2),n(2),n(7)-trimethyl 5'-triphosphoguanosine)-ribonucleoside in mrna + h2o <=> (n(2),n(2),n(7))-trimethyl-gmp + a 5'-end diphospho-ribonucleoside in mrna + 2 h(+)