Anti-SELI antibodies enable researchers to detect and measure the SELI antigen in biological samples. This target is a reported synonym of the SELENOI gene, which encodes selenoprotein I. This protein is a reported ethanolaminephosphotransferase that catalyzes the transfer of phosphoethanolamine/PE from CDP-ethanolamine to lipid acceptors, the final step in the synthesis of PE via the 'Kennedy' pathway. The human version of SELI has a canonical amino acid length of 397 residues and a protein mass of 45.2 kilodaltons. It is reported to be localized in the ER of cells and widely expressed in many tissue types. SELI is a member of the CDP-alcohol phosphatidyltransferase class-I protein family.