an rna polymerase ( nucleosidetriphosphate : rna nucleotidyltransferase , ec 2.7.7.6 ) has been purified from phage-sp01-infected bacillus subtilis that copies rna almost exclusively from the heavy strand of native sp01 dna , the dna strand from which `` '' middle '' '' and `` '' late '' '' classes of rna are copied in vivo .
C0035681
rna polymerase
C0035673
rna nucleotidyltransferase