Anti-LSIGN antibodies enable researchers to detect and measure the LSIGN antigen in biological samples. This target is a reported synonym of the CLEC4M gene, which encodes C-type lectin domain family 4 member M. This protein is known to function in adaptive immune responses, among other biological roles. The human version of LSIGN has a canonical amino acid length of 399 residues and a protein mass of 45.4 kilodaltons. It is reported to be localized in the cell membrane and is secreted of cells and notably expressed in the testis, colon, and cerebral cortex. Other names for this target antigen include CD209L, CD299, and DC-SIGN2.