ID 3.1.1.82 DE pheophorbidase. AN phedase. AN PPD. CA H(+) + H2O + pheophorbide a = CO2 + methanol + pyropheophorbide a. CC -!- Forms part of the chlorophyll degradation pathway, and is found in CC higher plants and in algae. CC -!- In higher plants it participates in de-greening processes such as CC fruit ripening, leaf senescence, and flowering. CC -!- Exists in two forms: type 1 is induced by senescence whereas type 2 CC is constitutively expressed. CC -!- Highly specific for pheophorbide as substrate (with a preference for CC pheophorbide a over pheophorbide b) as other chlorophyll derivatives CC such as protochlorophyllide a, pheophytin a and c, chlorophyll a and CC b, and chlorophyllide a cannot act as substrates. CC -!- Another enzyme, called pheophorbide demethoxycarbonylase (PDC), CC produces pyropheophorbide a from pheophorbide a without forming an CC intermediate although the precise reaction is not yet known. DR Q2V0W1, PPD_RAPSA ; //