In enzymology, a carboxy-cis,cis-muconate cyclase is an enzyme that catalyzes the chemical reaction 3-carboxy-2,5-dihydro-5-oxofuran-2-acetate ⇌ {\displaystyle \rightleftharpoons } 3-carboxy-cis,cis-muconateHence, this enzyme has one substrate, 3-carboxy-2,5-dihydro-5-oxofuran-2-acetate, and one product, 3-carboxy-cis,cis-muconate. Wikipedia