transcription repressor of the [[gene|3F502A4DCB1DAD7C3F968465B13C35213240515B]]-[[gene|70B45E7428DB1F6AEF7D2FE3062CC86BE96674FC]]-[[gene|C48798FE13B1521236F5BC5786B9A02D7BC9A336]]-[[gene|1532EC3D741C5AB3D0B642741218FAE00AD460FA]] and [[gene|1ADC55F8E265AF86E29743C671CE1EA1BE7EB41E]]-[[gene|B90D4E798145F2AF3421DDC5AB6CD578E2E17900]] operons