>2IYG_1|Chains A, B|APPA, ANTIREPRESSOR OF PPSR, SENSOR OF BLUE LIGHT|RHODOBACTER SPHAEROIDES (1063) MQHDLEADVTMTGSDLVSCSYRSLAAPDLTLRDLLDIVETSQAHNARAQLTGALFYSQGVFFQWLEGRPAAVAEVMTHIQRDRRHSNVEILAEEPIAKRRFAGWHMQLSCSEADMRSLGLAESR