GAPDH-2 (Glyceraldehyde-3-phosphate dehydrogenase 2; also GAPD2 and GAPDS) is a 40-44 kDa member of the GAPDH family of enzymes. Due to a high incidence of proline residues, it may migrate anomalously at 56 kDa in SDS-PAGE. GAPDH-2 is expressed only in testis as a homotetramer, where it is found in the cytoplasm bound to the sperm fibrous sheath. Unlike GAPDH that has multiple functions, GAPDH-2 appears to participate only in carbohydrate metabolism, generating energy via glycolysis for sperm motility and fertility. Human GAPDH-2 is 408 amino acids (aa) in length. There are two NAD binding sites (Asp106 and Asn388) with a catalytic region between aa 223-226. One splice variant shows a nine aa insertion after Ser220. Over aa 75-222, human GAPDH-2 shares 84% aa identity with mouse GAPDH-2.
Key Product Details
Species Reactivity
Human
Applications
Immunohistochemistry, Western Blot
Label
Unconjugated
Antibody Source
Polyclonal Goat IgG
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Product Specifications
Immunogen
E. coli-derived recombinant human GAPDH-2
Glu75-Ala222
Accession # O14556
Glu75-Ala222
Accession # O14556
Specificity
Detects human GAPDH-2 in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human GAPDH and recombinant mouse GAPDH is observed.
Clonality
Polyclonal
Host
Goat
Isotype
IgG
Scientific Data Images for Human GAPDH‑2 Antibody
Detection of Human GAPDH‑2 by Western Blot.
Western blot shows lysates of human testis tissue. PVDF Membrane was probed with 1 µg/mL of Goat Anti-Human GAPDH-2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6276) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF109). A specific band was detected for GAPDH-2 at approximately 56 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
GAPDH‑2 in Human Testes.
GAPDH-2 was detected in immersion fixed paraffin-embedded sections of human testes using Goat Anti-Human GAPDH-2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF6276) at 3 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-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Specific staining was localized to cytoplasm of sperm cells. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.Applications for Human GAPDH‑2 Antibody
Application
Recommended Usage
Immunohistochemistry
5-15 µg/mL
Sample: Immersion fixed paraffin-embedded sections of human testes
Sample: Immersion fixed paraffin-embedded sections of human testes
Western Blot
1 µg/mL
Sample: Human testis tissue
Sample: Human testis tissue
Formulation, Preparation, and Storage
Purification
Antigen Affinity-purified
Reconstitution
Sterile PBS to a final concentration of 0.2 mg/mL. For liquid material, refer to CoA for concentration.
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Formulation
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
Shipping
Lyophilized product is shipped at ambient temperature. Liquid small pack size (-SP) is shipped with polar packs. Upon receipt, store immediately at the temperature recommended below.
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.
Calculators
Background: GAPDH-2
Long Name
Glyceraldehyde-3-phosphate Dehydrogenase 2
Alternate Names
GAPD2, GAPDH2, GAPDHS, HSD-35
Gene Symbol
GAPDHS
UniProt
Additional GAPDH-2 Products
Product Documents for Human GAPDH‑2 Antibody
Certificate of Analysis
To download a Certificate of Analysis, please enter a lot or batch number in the search box below.
Note: Certificate of Analysis not available for kit components.
Product Specific Notices for Human GAPDH‑2 Antibody
For research use only
Related Research Areas
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Protocols
Find general support by application which include: protocols, troubleshooting, illustrated assays, videos and webinars.
- Antigen Retrieval Protocol (PIER)
- Antigen Retrieval for Frozen Sections Protocol
- Appropriate Fixation of IHC/ICC Samples
- Cellular Response to Hypoxia Protocols
- Chromogenic IHC Staining of Formalin-Fixed Paraffin-Embedded (FFPE) Tissue Protocol
- Chromogenic Immunohistochemistry Staining of Frozen Tissue
- ClariTSA™ Fluorophore Kits
- Detection & Visualization of Antibody Binding
- Fluorescent IHC Staining of Frozen Tissue Protocol
- Graphic Protocol for Heat-induced Epitope Retrieval
- Graphic Protocol for the Preparation and Fluorescent IHC Staining of Frozen Tissue Sections
- Graphic Protocol for the Preparation and Fluorescent IHC Staining of Paraffin-embedded Tissue Sections
- Graphic Protocol for the Preparation of Gelatin-coated Slides for Histological Tissue Sections
- IHC Sample Preparation (Frozen sections vs Paraffin)
- Immunofluorescent IHC Staining of Formalin-Fixed Paraffin-Embedded (FFPE) Tissue Protocol
- Immunohistochemistry (IHC) and Immunocytochemistry (ICC) Protocols
- Immunohistochemistry Frozen Troubleshooting
- Immunohistochemistry Paraffin Troubleshooting
- Preparing Samples for IHC/ICC Experiments
- Preventing Non-Specific Staining (Non-Specific Binding)
- Primary Antibody Selection & Optimization
- Protocol for Heat-Induced Epitope Retrieval (HIER)
- Protocol for Making a 4% Formaldehyde Solution in PBS
- Protocol for VisUCyte™ HRP Polymer Detection Reagent
- Protocol for the Preparation & Fixation of Cells on Coverslips
- Protocol for the Preparation and Chromogenic IHC Staining of Frozen Tissue Sections
- Protocol for the Preparation and Chromogenic IHC Staining of Frozen Tissue Sections - Graphic
- Protocol for the Preparation and Chromogenic IHC Staining of Paraffin-embedded Tissue Sections
- Protocol for the Preparation and Chromogenic IHC Staining of Paraffin-embedded Tissue Sections - Graphic
- Protocol for the Preparation and Fluorescent IHC Staining of Frozen Tissue Sections
- Protocol for the Preparation and Fluorescent IHC Staining of Paraffin-embedded Tissue Sections
- Protocol for the Preparation of Gelatin-coated Slides for Histological Tissue Sections
- R&D Systems Quality Control Western Blot Protocol
- TUNEL and Active Caspase-3 Detection by IHC/ICC Protocol
- The Importance of IHC/ICC Controls
- Troubleshooting Guide: Immunohistochemistry
- Troubleshooting Guide: Western Blot Figures
- Western Blot Conditions
- Western Blot Protocol
- Western Blot Protocol for Cell Lysates
- Western Blot Troubleshooting
- Western Blot Troubleshooting Guide
- View all Protocols, Troubleshooting, Illustrated assays and Webinars
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