1.3.7.3	(3Z)-phycoerythrobilin + oxidized ferredoxin	-	
1.3.7.3	(3Z)-phycoerythrobilin + oxidized ferredoxin	biosynthesis of bilin pigments, functions with EC1.3.7.2. as a dual enzyme complex in the conversion of biliverdin Ixa into phycoerythrobilin	
1.3.7.3	15,16-dihydrobiliverdin + reduced ferredoxin	-	
1.3.7.3	additional information	the enzyme performs substrate channeling with the 15,16-dihydrobiliverdin:ferredoxin oxidoreductase catalyzing the former catalytic step. Both enzymes transiently interact and that transfer of the intermediate is facilitated by a significantly higher binding affinity of DHBV toward phycoerythrobilin:ferredoxin oxidoreductase