This polymerase possesses two enzymatic activities: DNA synthesis (polymerase) and an exonucleolytic activity that degrades single-stranded DNA in the 3'- to 5'-direction. a 2'-deoxyribonucleoside 5'-triphosphate + DNA(n) = diphosphate + DNA(n+1) Binds 1 [4Fe-4S] cluster. May also use Mn(2+). The small regulatory subunit delta and PCNA1 increase POLD catalytic activity. Heterodimer composed of a catalytic subunit POLD and a small regulatory subunit. Expressed during the asexual blood stage specifically in trophozoites and schizonts (at protein level). The CysB motif binds 1 4Fe-4S cluster and is required for the formation of polymerase complexes. In eukaryotes there are five DNA polymerases: alpha, beta, gamma, delta, and epsilon which are responsible for different reactions of DNA synthesis. Belongs to the DNA polymerase type-B family.