label: a 5'-end (N(7)-methyl 5'-triphosphoguanosine)-(purine-ribonucleoside) in mRNA + H2O = a 5'-end phospho (purine-ribonucleoside) in mRNA + N(7)-methyl-GDP + 2 H(+)
label_lc: a 5'-end (n(7)-methyl 5'-triphosphoguanosine)-(purine-ribonucleoside) in mrna + h2o = a 5'-end phospho (purine-ribonucleoside) in mrna + n(7)-methyl-gdp + 2 h(+)