An alpha-like DNA polymerase from Halobacterium halobium

Abstract
Two DNA-polymerases have been isolated from extracts of Halobacterium halobium one having a sedimentation coefficient of 11 S, designated as .alpha.-like polymerase and possessing the following characteristics. It is sensitive to both aphidicolin and N-ethylmaleimide but indifferent to the presence of a dideoxynucleoside triphosphate. Therefore this polymerase is very similar to the .alpha. DNA polymerase of eukaryotes. The enzyme requires 5 M NaCl for maximum activity. The other polymerase has a sedimentation coefficient of 4.4 S and is resistant to both aphidicolin and N-ethylmaleimide. However, it is inhibited by a dideoxynucleoside triphosphate.