ID 5.5.1.11 DE dichloromuconate cycloisomerase. CA 2,4-dichloro-5-oxo-2,5-dihydro-2-furylacetate = (2E,4E)-2,4- CA dichloromuconate + H(+). CC -!- The product of cyclisomerization of dichloro-cis,cis-muconate CC spontaneously eliminates chloride to produce cis-4-carboxymethylene- CC 3-chlorobut-2-en-4-olide. CC -!- Also acts, in the reverse direction, on cis,cis-muconate and its CC monochloro-derivatives, but with lower affinity. CC -!- Not identical with EC 5.5.1.1 or EC 5.5.1.7. //