1-heptadecanoyl-sn-glycero-3-phosphate + octadecanoyl-CoA = 1-heptadecanoyl-2-octadecanoyl-sn-glycero-3-phosphate + CoA
1-heptadecanoyl-sn-glycero-3-phosphate + octadecanoyl-coa = 1-heptadecanoyl-2-octadecanoyl-sn-glycero-3-phosphate + coa