Anti-LI4 antibodies enable researchers to detect and measure the LI4 antigen in biological samples. This target is a reported synonym of the LIPN gene, which encodes lipase family member N. This protein is known to function in the metabolism of lipids, among other biological roles. The human version of LI4 has a canonical amino acid length of 398 residues and a protein mass of 45.5 kilodaltons. It is reported to be a secreted protein. LI4 is a member of the Lipase protein family.