a CDP-1,2-diacyl-sn-glycerol + L-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-L-serine + CMP + H(+)
a cdp-1,2-diacyl-sn-glycerol + l-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-l-serine + cmp + h(+)
a CDP-1,2-diacyl-sn-glycerol + L-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-L-serine + CMP + H(+)
a cdp-1,2-diacyl-sn-glycerol + l-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-l-serine + cmp + h(+)