a 5'-end 5'-phospho-2'-deoxyribonucleoside-DNA + H2O = a 5'-end dephospho-2'-deoxyribonucleoside-DNA + phosphate
a 5'-end 5'-phospho-2'-deoxyribonucleoside-dna + h2o = a 5'-end dephospho-2'-deoxyribonucleoside-dna + phosphate