ID 5.3.3.4 DE muconolactone Delta-isomerase. AN muconolactone isomerase. CA (S)-muconolactone = (4,5-dihydro-5-oxofuran-2-yl)-acetate. CC -!- Formerly EC 3.1.1.16. DR O33947, CATC1_ACILW; O33951, CATC2_ACILW; Q43932, CATC_ACIAD ; DR P80573, CATC_CUPPJ ; Q9I0X4, CATC_PSEAE ; P00948, CATC_PSEPU ; DR P95609, CATC_RHOOP ; //