electron microscopy was used to study the formation of random complexes between escherichia coli rna polymerase ( nucleosidetriphosphate : rna nucleotidyltransferase , ec 2.7.7.6 ) and a promoterless fragment ( mbo i-c ) of bacteriophage t7 dna , and to determine the location of the polymerase molecules bound at 3 degrees to the promoter-containing ( hinf ) 1100 fragment of the same dna .
C0035681
rna polymerase
C0035673
rna