Dihydroxyacetone-3-phosphate and glyceraldehyde-3-phosphate are interconvertible. The enzyme responsible for this interconversion belongs to the category of
Isomerases
Isomerases catalyze the change of a substrate into a related isomeric form by rearrangement of molecules. Dihydroxyacetone-3-phosphate Triose⇌Phophate isomeraseGlyceraldehyde-3-phosphate