a putative promoter region , extending from 218 base pairs ( bp ) before ( -218 ) to 10 bp after ( +10 ) the rna start site of a vaccinia virus gene encoding an mr-28,000 precursor of a core polypeptide that is expressed only after the onset of dna replication was linked to dna coding for the procaryotic enzyme chloramphenicol acetyltransferase ( cat ) .
C0598312
dna replication
C0012854
dna