>7kuf_B mol:protein length:112 RNA polymerase sigma factor, DNA-directed RNA polymerase subunit beta chimeraMAHHHHHHVAVDAVSFTLLQDQLQSVLDTLSEREAGVVRLRFGLTDGQPRTLDEIGQVYGVTRERIRQIESKTMSKLRHPSRSQVLRDYLDGSSGSGTPEERLLRAIFGEKA