HPS4 ELISA kits are immunoassay tools for the measurement of the protein HPS4 biogenesis of lysosomal organelles complex 3 subunit 2, which is encoded by the HPS4 gene in humans. Functionally, this protein 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. The canonical protein structure is reported to have an amino acid sequence of 708 residues and a mass of 76.9 kDa. As many as 4 protein isoforms have been reported. The HPS4 gene has been associated with the disease, Hermansky-Pudlak syndrome. Other alias names for this target include BLOC-3 complex member HPS4 and light-ear protein homolog. Click on the products below for more detailed ELISA kit information, such as target reactivity and assay sensitivity.