a 1-acyl-sn-glycero-3-phospho-(1D-myo-inositol) + (5Z,8Z,11Z,14Z,17Z)-eicosapentaenoyl-CoA = a 1-acyl-2-(5Z,8Z,11Z,14Z,17Z-eicosapentaenoyl)-sn-glycero-3-phospho-(1D-myo-inositol) + CoA — reaction