a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) = diphosphate + DNA(n+1) Belongs to the DNA polymerase type-B family. The strain used in PubMed:9049389 and PubMed:19014498 had been extensively passaged and contains genetic alterations. A correct sequence has thus been sequenced in PubMed:23516193 by direct sequencing of salivary gland homogenates.