D-glyceraldehyde 3-phosphate = dihydroxyacetone phosphate Carbohydrate biosynthesis; gluconeogenesis. Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate from glycerone phosphate: step 1/1. Homodimer. The enzyme contains a high proportion of positively-charged residues in beta-barrels V and VII (compared to the homologous regions in other triose isomerase sequences). Since 2 clusters of positive charges located at precise distances on the molecular surface are common to 4 glycosomal enzymes, it has been speculated that this might represent a signal for entry into glycosomes (PubMed:3015595). Belongs to the triosephosphate isomerase family.