Cell-surface glycoprotein having a role in immunoadhesion (PubMed:7526854). Mediates in the adhesion of blood neutrophils in cytokine-activated endothelium through interaction with SELPLG/PSGL1. May have a role in capillary morphogenesis (By similarity). Interacts with SELPLG/PSGL1 and PODXL2 through the sialyl Lewis X epitope. SELPLG sulfation appears not to be required for this interaction. Important in acute cellular allograft rejection and probably also in xenograft rejection. Belongs to the selectin/LECAM family.