Anti-CD85k antibodies enable researchers to detect and measure the CD85k antigen in biological samples. This target is a reported synonym of the LILRB4 gene, which encodes leukocyte immunoglobulin like receptor B4. This protein is known to function in adaptive immune responses and cytokine-mediated signaling pathways, among other biological roles. The human version of CD85k has a canonical amino acid length of 448 residues and a protein mass of 49.4 kilodaltons, although 3 isoforms have been identified. It is reported to be localized in the cell membrane of cells. Other names for this target antigen include B4 and ILT-3. ELISA, Western Blot, and Immunofluorescence are common applications for CD85k antibodies.