ID 5.2.1.2 DE maleylacetoacetate isomerase. AN maleylacetone isomerase. CA 4-maleylacetoacetate = 4-fumarylacetoacetate. CC -!- Also acts on maleylpyruvate. DR Q9VHD3, MAAI1_DROME; Q9VHD2, MAAI2_DROME; Q18938, MAAI_CAEEL ; DR Q54YN2, MAAI_DICDI ; O43123, MAAI_EMENI ; O43708, MAAI_HUMAN ; DR Q9WVL0, MAAI_MOUSE ; P57109, MAAI_PSEAE ; P57113, MAAI_RAT ; DR Q9X4F7, MAAI_RHIME ; Q9KSB2, MAAI_VIBCH ; Q4WHT7, MAIA_ASPFU ; //