label: a 5'-end NTP-ribonucleotide-RNA + H2O => a 5'-end phospho-ribonucleoside-ribonucleotide-RNA + diphosphate + H(+)
label_lc: a 5'-end ntp-ribonucleotide-rna + h2o => a 5'-end phospho-ribonucleoside-ribonucleotide-rna + diphosphate + h(+)