6-phospho-3-hexuloisomerase

6-phospho-3-hexuloisomerase (, 3-hexulose-6-phosphate isomerase, phospho-3-hexuloisomerase, PHI, 6-phospho-3-hexulose isomerase, YckF) is an enzyme with systematic name D-arabino-hex-3-ulose-6-phosphate isomerase. This enzyme catalyses the following chemical reaction


 * D-arabino-hex-3-ulose 6-phosphate $$\rightleftharpoons$$ D-fructose 6-phosphate

This enzyme plays a key role in the ribulose-monophosphate cycle of formaldehyde fixation.