>1r5u_J mol:protein length:70 DNA-directed RNA polymerases I, II, and III 8.3 kDa polypeptideMIVPVRCFSCGKVVGDKWESYLNLLQEDELDEGTALSRLGLKRYCCRRMILTHVDLIEKFLRYNPLEKRD