ID 2.5.1.62 DE chlorophyll synthase. CA chlorophyllide a + H(+) + phytyl diphosphate = chlorophyll a + CA diphosphate. CC -!- The enzyme is modified by binding of the first substrate, phytyl CC diphosphate, before reaction of the modified enzyme with the second CC substrate, chlorophyllide a, can occur. CC -!- The reaction also occurs when phytyl diphosphate is replaced by CC geranylgeranyl diphosphate. DR Q38833, CHLG_ARATH ; Q9M3W5, CHLG_AVESA ; Q5W6H5, CHLG_ORYSJ ; //