. "Catalysis of the reaction: deoxynucleoside triphosphate + DNA(n) = diphosphate + DNA(n+1)." . . "TdT" . "DNA nucleotidylexotransferase activity" . "addase activity" . "deoxynucleotidyl terminal transferase activity" . "deoxyribonucleic acid nucleotidyltransferase activity" . "deoxyribonucleic nucleotidyltransferase activity" . "nucleoside-triphosphate:DNA deoxynucleotidylexotransferase activity" . "terminal addition enzyme activity" . "terminal deoxynucleotide transferase activity" . "terminal deoxynucleotidyltransferase activity" . "terminal deoxyribonucleotidyltransferase activity" . "terminal transferase activity" . . .