Anti-PCSK4 antibodies are used in the immunodetection of the protein proprotein convertase subtilisin/kexin type 4. In humans, the canonical protein has a reported length of 755 amino acid residues and a mass of 82.8 kDa. Its subcellular localization is in the cytoplasmic vesicles and membrane. Up to 2 different isoforms have been reported for this protein. A member of the Peptidase S8 protein family, PCSK4 is known to be a proprotein convertase involved in the processing of hormone and other protein precursors at sites comprised of pairs of basic amino acid residues (By similarity). Post-translational modifications have been described, including N-glycosylation and protein cleavage. Synonyms for this target antigen include SPC5, proprotein convertase subtilisin/kexin type 4, testicular tissue protein Li 135, and PC4. PCSK4 gene orthologs have been reported in the mouse, rat, bovine, frog, chimpanzee and chicken species. Western Blot is a widely used application for the PCSK4 antibodies listed below. In addition, Immunofluorescence is also a common application.