label: a 5'-end guanosine-5'-diphospho-5'-(2'-deoxyribonucleoside)-DNA + H2O = a 5'-end 5'-phospho-2'-deoxyribonucleoside-DNA + GMP + 2 H(+)
label_lc: a 5'-end guanosine-5'-diphospho-5'-(2'-deoxyribonucleoside)-dna + h2o = a 5'-end 5'-phospho-2'-deoxyribonucleoside-dna + gmp + 2 h(+)