label: 3'-dephospho-CoA + a 5'-end phospho-ribonucleoside in mRNA + H(+) => a 5'-end CoA-ribonucleoside in mRNA + H2O
label_lc: 3'-dephospho-coa + a 5'-end phospho-ribonucleoside in mrna + h(+) => a 5'-end coa-ribonucleoside in mrna + h2o