https://www.ncbi.nlm.nih.gov/Structure/pdb/6PSS
6PSS: Escherichia coli RNA polymerase promoter unwinding intermediate (TRPi1.5a) with TraR and...
DNA (85-MER)DNA-directed RNA polymerase subunit alphaDNA-directed RNA polymerase subunit betaDNA-directed RNA polymerase subunit beta'DNA-directed RNA...