a 1,2-diacyl-sn-glycero-3-phospho-L-serine + choline => a 1,2-diacyl-sn-glycero-3-phosphocholine + L-serine
a 1,2-diacyl-sn-glycero-3-phospho-l-serine + choline => a 1,2-diacyl-sn-glycero-3-phosphocholine + l-serine