Involved in the gluconeogenesis. Catalyzes stereospecifically the conversion of dihydroxyacetone phosphate (DHAP) to D-glyceraldehyde-3-phosphate (G3P). D-glyceraldehyde 3-phosphate = dihydroxyacetone phosphate Carbohydrate biosynthesis; gluconeogenesis. Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate from glycerone phosphate: step 1/1. Homodimer. Belongs to the triosephosphate isomerase family. Could be the product of a pseudogene. Truncated C-terminus.