(5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl-CoA + AMP + diphosphate => (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoate + ATP + CoA
(5z,8z,11z,14z,17z)-eicosapentaenoyl-coa + amp + diphosphate => (5z,8z,11z,14z,17z)-eicosapentaenoate + atp + coa