>9l0y_J mol:protein length:129 Middle operon regulatorMTEDLFGDLQDDTILAHLDNPAEDTSRFPALLAELNDLLRGELSRLGVDPAHSLEIVVAICKHLGGGQVYIPRGQALDSLIRDLRIWNDFNGRNVSELTTRYGVTFNTVYKAIRRMRRLKYRQYQPSLL