label: zeaxanthin epoxidase activity
label_lc: zeaxanthin epoxidase activity
description: "Catalysis of the reaction: all-trans-zeaxanthin + 4 H+ + 2 O2 + 4 reduced [2Fe-2S]-[ferredoxin] = all-trans-violaxanthin + 2 H2O + 4 oxidized [2Fe-2S]-[ferredoxin]."