>3MZI_1|Chains A, B, C, D, E, F|Activator of photopigment and puc expression|Synechocystis sp. PCC 6803 (1148) MSLYRLIFSSQGIPNLQPQDLKDILESSQRNNPANGITGLLCYSKPAFLQVLEGECEQVNETYHRIVQDERHHSPQIIECMPIRRRNFEVWSMQAITVNDLSTEQVKTLVLKYSGFTTLRPSAMDPEQCLNFLLDIAKIYELSDNFFLDL