Detection of Human Hexosaminidase A/HEXA by Western Blot.
Western blot shows lysates of HepG2 human hepatocellular carcinoma cell line and human liver tissue. PVDF membrane was probed with 2 µg/mL of Mouse Anti-Human Hexosaminidase A/HEXA Monoclonal Antibody (Catalog # MAB6237) followed by HRP-conjugated Anti-Mouse IgG Secondary Antibody (Catalog # HAF007). A specific band was detected for Hexosaminidase A/HEXA at approximately 60 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Hexosaminidase A/HEXA in Human Brain.
Hexosaminidase A/HEXA was detected in immersion fixed paraffin-embedded sections of human brain (hypothalamus) using Mouse Anti-Human Hexosaminidase A/HEXA Monoclonal Antibody (Catalog # MAB6237) at 15 µg/mL overnight at 4 °C. Before incubation with the primary antibody, tissue was subjected to heat-induced epitope retrieval using Antigen Retrieval Reagent-Basic (Catalog # CTS013). Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Specific staining was localized to the cytoplasm and lysosomes in neuronal cell bodies. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Preparation and Storage
Sterile PBS to a final concentration of 0.5 mg/mL.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
Background: Hexosaminidase A/HEXA
beta -hexosaminidases are enzymes involved in the hydrolysis of terminal N-acetyl-D-hexosamine residues in GM2 gangliosides and globo-sphingolipids in lysosomes (1‑4). The enzymes are composed of two alpha and/or beta subunits, which are coded by HEXA and HEXB genes, respectively. Different association of the alpha and beta subunits gives rise to beta ‑hexosaminidase isoforms A, B and S (Hex A, B and S) (5), which have the composition of alpha beta, beta beta and alpha alpha, respectively. Our recombinant HEXA is presumably isoform Hex S, because only alpha subunit was expressed. Hex S is suggested to releases non‑reducing end N-acetylgalactosamine residues from dermatan sulfate, chondroitin sulfate and sulfated glycolipid SM2 (6). Recombinant HEXA is also highly active on 4-methylumbelliferyl-N-acetyl-beta -D-glucosaminide (6). Mutations in HEXA and HEXB genes cause lysosomal lipid storage disorders. Specifically, mutations of HEXA cause Tay-Sachs disease, manifested by the harmful accumulation of ganglioside GM2 in tissues and nerve cells in the brain (7‑10). Children with this disease usually die by age 4.
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Hepbildikler, S.T. et al. (2002) J. Biol. Chem. 277:2562.
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