Anti-CD5 antibodies are used in applications like flow cytometry and immunofluorescence, to detect the protein encoded by the gene CD5 molecule (CD5) in humans. The canonical CD5 protein is 495 amino acids in length, 54.6 kDa in mass, and has a membrane subcellular localization. CD5 exhibits signaling receptor activity and scavenger receptor activity. Post-translational modifications have been described, notably phosphorylation and glycosylation. Synonyms for this protein include: LEU1; T1; T-cell surface glycoprotein CD5; CD5 antigen (p56-62); epididymis secretory sperm binding protein. Orthologs for CD5 have also been reported in other species, including mouse, rat, bovine, zebrafish, chimpanzee and chicken.