Class of enzymes
Pheophorbide a oxygenase (EC 1.14.15.17, "pheide a monooxygenase", "pheide a oxygenase", "PAO") is an enzyme with systematic name "pheophorbide-a,NADPH:oxygen oxidoreductase (biladiene-forming)". This enzyme catalyses the following chemical reaction
 Pheophorbide a + NADPH + H+ + O2 formula_1 red chlorophyll catabolite + NADP+
Pheophorbide a oxygenase participates in chlorophyll degradation. Loss-of-function mutations in the gene can lead to a "stay-green" phenotype in plants.
References.
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