phage fd dna complexed with dna binding protein i was used by escherichia coli rna polymerase ( nucleoside triphosphate : rna nucleotidyltransferase , ec 2.7.7.6 ) to synthesize an rna at the origin of single strand to double strand replication .
C0035681
rna polymerase
C0035673
rna nucleotidyltransferase