label: a 3'-end 2'-deoxyribonucleotide-3'-diphospho-5'-guanosine-DNA + H2O => a 3'-end 2'-deoxyribonucleotide 3'-phosphate-DNA + GMP + 2 H(+)
label_lc: a 3'-end 2'-deoxyribonucleotide-3'-diphospho-5'-guanosine-dna + h2o => a 3'-end 2'-deoxyribonucleotide 3'-phosphate-dna + gmp + 2 h(+)