5.3.2.7 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose i.e. ascopyrone M. This enzyme catalyses one of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose 383006 5.3.2.7 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose i.e. ascopyrone M. This enzyme catalyses one of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.110 (aldos-2-ulose dehydratase), EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase) and EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) 383006 5.3.2.7 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose i.e. ascopyrone M 383006 5.3.2.7 ascopyrone M - 427355