An enzyme that catalyzes the interconversion of dihydroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (G3P). It plays a critical role in glycolysis, which is the metabolic pathway that converts glucose into energy.

There is only one known triosephosphate isomerase in the human body, and that is:

Triosephosphate isomerase (TPI): This enzyme is involved in the conversion of DHAP into G3P, and vice versa, as part of the glycolysis pathway.

Triosephosphate isomerase is a highly conserved enzyme, and is found in a wide range of organisms, from bacteria to humans. It is one of the most studied enzymes in biochemistry, and has been found to play a critical role in a number of metabolic processes.