phycoerythrobilin synthase activity
Catalysis of the reaction: biliverdin IXalpha + 2 reduced ferredoxin + 4 H+ = (3Z)-phycoerythrobilin + 2 oxidized ferredoxin.
GO:0016636
oxidoreductase activity, acting on the CH-CH group of donors, iron-sulfur protein as acceptor
is_a