when bacteriophage lambdapga18 dna is transcribed in a purified in vitro system by e. coli rna polymerase ( nucleoside triphosphate : rna nucleotidyl-transferase , ec 2.7.7.6 ) , several major transcripts are synthesized .
C0035681
rna polymerase
C0035673
rna nucleotidyl-transferase