ID   1.13.12.14
DE   Chlorophyllide-a oxygenase.
AN   CAO.
AN   Chlorophyllide a oxygenase.
AN   Cholorophyll-b synthase.
CA   (1) Chlorophyllide a + O(2) + NADPH = 7-hydroxychlorophyllide a + H(2)O +
CA   NADP(+).
CA   (2) 7-hydroxychlorophyllide a + O(2) + NADPH = chlorophyllide b + 2 H(2)O
CA   + NADP(+).
CF   Iron.
CC   -!- Catalyzes two successive hydroxylations at the 7-methyl group of
CC       chlorophyllide a.
CC   -!- The second step yields the aldehyde hydrate, which loses H(2)O
CC       spontaneously to form chlorophyllide b.
CC   -!- Chlorophyll a and protochlorophyllide a are not substrates.
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