label: a 3'end (2'-deoxyribonucleotide 3'-phosphate)-DNA + H2O <=> a 3'-end 2'-deoxyribonucleotide-DNA + phosphate
label_lc: a 3'end (2'-deoxyribonucleotide 3'-phosphate)-dna + h2o <=> a 3'-end 2'-deoxyribonucleotide-dna + phosphate