preparations of bacillus subtilis rna polymerase ( nucleosidetriphosphate : rna nucleotidyltransferase , ec 2.7.7.6 ) from vegetatively growing cells contain small amounts of an activity ( b. subtilis rna polymerase holoenzyme ii ) that shows a unique promoter specificity with t7 bacteriophage dna as compared with the normal b. subtilis holoenzyme ( holoenzyme i ) and lacks the normal sigma subunit [ jaehning , j. a. , wiggs , j. l. & chamberlin , m. j . ( 1979 ) proc . natl . acad . sci . usa 76 , 5470-5474 ] .
C0035681
rna polymerase
C0035673
rna