obsolete chlorophyllide-a:geranyl-geranyl diphosphate geranyl-geranyl transferase activity (obsolete GO:0102747)
OBSOLETE. Catalysis of the reaction: H+ + chlorophyllide a(1-) + 2-trans,6-trans,10-trans-geranylgeranyl diphosphate(3-) = geranylgeranyl-chlorophyll a + diphosphoric acid.