1.3.7.5	biliverdin IXalpha + 4 reduced ferredoxin	-	
1.3.7.5	biliverdin Ixalpha + reduced ferredoxin	-	
1.3.7.5	biliverdin Ixalpha + reduced ferredoxin	PcyA catalyzes the multi-step reduction of biliverdin IXalpha to produce 3Z/3E-phycocyanobilin