Anti-HPS1 antibodies are used in the immunodetection of the protein HPS1 biogenesis of lysosomal organelles complex 3 subunit 1. In humans, the canonical protein has a reported length of 700 amino acid residues and a mass of 79.3 kDa. Up to 4 different isoforms have been reported for this protein. It is ubiquitously expressed across many tissue types. HPS1 is a known component of the BLOC-3 complex, a complex that acts as a guanine exchange factor (GEF) for RAB32 and RAB38, promotes the exchange of GDP to GTP, converting them from an inactive GDP-bound form into an active GTP-bound form. Synonyms for this target antigen include HPS, BLOC-3 complex member HPS1, Hermansky-Pudlak syndrome 1 protein, and BLOC3S1. HPS1 gene orthologs have been reported in the mouse, rat, bovine, frog, zebrafish, chimpanzee and chicken species. A number of HPS1 antibodies have been mentioned in research publications and have associated citations. Western Blot is a widely used application for these antibodies. ELISA, Immunofluorescence, and Immunohistochemistry are also common applications.