D-glyceraldehyde 3-phosphate = dihydroxyacetone phosphate Carbohydrate biosynthesis; gluconeogenesis. Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate from glycerone phosphate: step 1/1. Homodimer. Present in substantial amounts in oocytes, declines in abundance in early embryos, and begins to increase during mid-embryogenesis. Levels peak in the third instar larva then decline during pupal stages, rising again near the time of eclosion. Belongs to the triosephosphate isomerase family.