prominent polypeptides with apparent molecular masses of 180 , 120 , 85 , and 38 kda are found in an extensively purified preparation of maize chloroplast dna-dependent rna polymerase that retains the capacity to initiate transcription of the cloned chloroplast gene rbcl correctly and the requirement for a supercoiled dna template for specific and active transcription .
C0035681
dna-dependent rna polymerase
C0040649
transcription