>3k4g_B mol:protein length:86 DNA-directed RNA polymerase subunit alphaMEKPEFDPILLRPVDDLELTVRSANCLKAEAIHYIGDLVQRTEVELLKTPNLGKKSLTEIKDVLASRGLSLGMRLENWPPASIADE