ID 5.3.3.13 DE polyenoic fatty acid isomerase. AN eicosapentaenoate cis-Delta(5,8,11,14,17)-eicosapentaenoate cis-Delta(5)- AN trans-Delta(7,9)-cis-Delta(14,17) isomerase. AN PFI. CA (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate = (5Z,7E,9E,14Z,17Z)- CA icosapentaenoate. CC -!- The enzyme from the red alga Ptilota filicina catalyzes the CC isomerization of skip dienes (methylene-interrupted double bonds) in CC a broad range of fatty acids and fatty-acid analogs, such as CC arachidonate and gamma-linolenate, to yield a conjugated triene. DR Q8W257, PFI_PTIFI ; //