polyenoic fatty acid isomerase; PFI; eicosapentaenoate cis-Delta5,8,11,14,17-eicosapentaenoate cis-Delta5-trans-Delta7,9-cis-Delta14,17 isomerase; (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate Delta8,11-Delta7,8-isomerase (incorrect); (5Z,8Z,11Z,14Z,17Z)-ei • • •