Anti-ICAM4 antibodies are used in the immunodetection of the protein intercellular adhesion molecule 4 (Landsteiner-Wiener blood group). In humans, the canonical protein has a reported length of 271 amino acid residues and a mass of 29.3 kDa. Its subcellular localization is in the cell membrane and is secreted. Up to 3 different isoforms have been reported for this protein. A member of the ICAM protein family, ICAM4 is known to be involved with cell adhesion. Post-translational modifications have been described, including O-glycosylation. Synonyms for this target antigen include LW, intercellular adhesion molecule 4, CD242 antigen, LW antigen a, Landsteiner-Wiener blood group antigen a, and CD242. ICAM4 gene orthologs have been reported in the mouse, rat, bovine and chimpanzee species. A number of ICAM4 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA and Immunohistochemistry are also common applications.