CDP-ethanolamine + L-serine <=> L-serine-phosphoethanolamine + CMP + H(+)
cdp-ethanolamine + l-serine <=> l-serine-phosphoethanolamine + cmp + h(+)
CDP-ethanolamine + L-serine <=> L-serine-phosphoethanolamine + CMP + H(+)
cdp-ethanolamine + l-serine <=> l-serine-phosphoethanolamine + cmp + h(+)