Anti-SLPI antibodies are used in the immunodetection of the protein secretory leukocyte peptidase inhibitor. In humans, the canonical protein has a reported length of 132 amino acid residues and a mass of 14.3 kDa. It has been described to be a secreted protein. It is notably expressed in blood plasma. SLPI is known to be involved with immune response pathways and innate immune responses. The SLPI marker can be used to identify Ureter Lipofibroblast Cells and Bladder Lipofibroblast Cells.* Synonyms for this target antigen include ALK1 and ALP. SLPI gene orthologs have been reported in the mouse, rat and chimpanzee species.
*HuBMAP Human Reference Atlas v1.4