ID 1.14.13.122 DE chlorophyllide a oxygenase. AN CAO. AN cholorophyll-b synthase. CA chlorophyllide a + 2 H(+) + 2 NADPH + 2 O2 = chlorophyllide b + 3 H2O + CA 2 NADP(+). CC -!- Catalyzes two successive hydroxylations at the 7-methyl group of CC chlorophyllide a. CC -!- The second step yields the aldehyde hydrate, which loses H2O CC spontaneously to form chlorophyllide b. CC -!- Chlorophyll a and protochlorophyllide a are not substrates. CC -!- Formerly EC 1.13.12.14. DR Q9MBA1, CAO_ARATH ; Q9ZWM5, CAO_CHLRE ; Q9XJ38, CAO_DUNSA ; DR Q8S7E1, CAO_ORYSJ ; //