1-hexadecanoyl-sn-glycero-3-phospho-L-serine + (9Z,12Z)-octadecadienoyl-CoA => 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phospho-L-serine + CoA
1-hexadecanoyl-sn-glycero-3-phospho-l-serine + (9z,12z)-octadecadienoyl-coa => 1-hexadecanoyl-2-(9z,12z-octadecadienoyl)-sn-glycero-3-phospho-l-serine + coa