1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + octadecanoyl-CoA => 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + CoA
1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + octadecanoyl-coa => 1-hexadecanoyl-2-octadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + coa