label: a 1,2-diacyl-sn-glycero-3-phosphoethanolamine + L-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-L-serine + ethanolamine
label_lc: a 1,2-diacyl-sn-glycero-3-phosphoethanolamine + l-serine <=> a 1,2-diacyl-sn-glycero-3-phospho-l-serine + ethanolamine