| Field | Specification |
|---|---|
| Target | |
| Alternative names | eIF-2-alpha kinase GCN2; Eukaryotic translation initiation factor 2-alpha kinase 4; GCN2-like protein; EIF2AK4; GCN2; KIAA1338 |
| UniProt # | |
| Host | |
| Clone | |
| Clonality | |
| Isotype | |
| Reactivity | |
| Applications | |
| Immunogen | A synthesized peptide derived from human GCN2 Can phosphorylate the alpha subunit of EIF2 and may mediate translational control. |
| Molecular weight | |
| Purification | |
| Reconstitution | |
| Cellular localization | |
| Concentration | |
| Form | Liquid |
| Storage | |
| Catalog no. (Mfr.) | |
| Main SKU |
Product Overview
Clone ACAA-5 is a rabbit monoclonal antibody that recognizes eIF-2-alpha kinase GCN2 (gene EIF2AK4) in human samples and is validated for Western blot, IHC, ICC/IF and flow cytometry. The predicted molecular weight is 186.9 kDa, and the supplier reports an observed band at about 187 kDa.
GCN2 (EIF2AK4) is a kinase that senses amino acid shortage through binding of uncharged tRNAs. It phosphorylates eIF2α to slow overall protein synthesis and activate ATF4, and it is studied in nutrient sensing and the integrated stress response.
| Target | EIF-2-alpha kinase GCN2 (gene EIF2AK4; UniProt Q9P2K8, human) |
|---|---|
| Clone | ACAA-5 |
| Host / Clonality / Isotype | Rabbit / Monoclonal / Rabbit IgG |
| Reactivity | Human |
| Form | Liquid |
| Formulation | PBS (pH 7.4); 150 mM NaCl; 0.02% sodium azide; 50% glycerol; plus stabilizers |
| Calculated MW | 186.9 kDa |
| Observed MW | 187 kDa |
| Storage | Long term: −20 °C for up to 12 months. Frequent use: 4 °C for up to 1 month. Avoid repeated freeze–thaw cycles. |
Validated Applications
| Western blot | 1:500–1:2000 |
|---|---|
| Immunohistochemistry | 1:50–1:200 |
| Immunocytochemistry / Immunofluorescence | 1:50–1:200 |
| Flow cytometry | 1:50 |
Samples with a confirmed band (WB): HeLa cells.
Recommended loading (WB): 20–40 µg of total protein per lane.
Immunogen
Synthetic peptide based on the sequence of human GCN2.
Reactivity Notes
The supplier lists reactivity with human. UniProt places eIF-2-alpha kinase GCN2 in the cytoplasm. Tissue expression noted by UniProt (human): Widely expressed. The samples tested by the supplier (listed above) are a practical starting point for positive controls.
Safety
Customization & Add-ons: Can’t find the antibody you need—or require a custom format for your assay? We can help you source the best match or support custom antibody solutions for diverse research needs, including species and isotype selection, conjugations and labeling (e.g., HRP/AP, biotin, fluorophores), purification grade options (Protein A/G, affinity purified), formulation preferences (buffer selection, carrier-free, glycerol-free), custom concentrations and aliquoting, low-endotoxin options for cell-based work, and application-focused QC/validation support (project dependent). Click Talk to a Scientist to submit a request, email us at support@biohippo.com, or explore our Research Services for additional support—our team will follow up with feasibility details and next steps.
Dong Sun et al. (2025) GCN2 promotes fatty acid metabolism through the activation of PI3K/AKT signaling in gastric cancer. Cellular Signalling. 10.1016/j.cellsig.2025.111984
