|GRK2 in Human Alzheimer's Disease Brain. GRK2 was detected in immersion fixed paraffin-embedded sections of human Alzheimer's disease brain using Human/Mouse/Rat GRK2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4339) at 10 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-Sheep HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS019) and counterstained with hematoxylin (blue). Specific labeling was localized to the cytoplasm of neurons. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.|
|Detection of Human/Mouse/Rat GRK2 by Western Blot. Western blot shows lysates of HeLa human cervical epithelial carcinoma cell line, BaF3 mouse pro‑B cell line, and Rat‑2 rat embryonic fibroblast cell line. PVDF membrane was probed with 1 µg/mL of Human/Mouse/Rat GRK2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF4339) followed by HRP-conjugated Anti-Sheep IgG Secondary Antibody (Catalog # HAF016). A specific band was detected for GRK2 at approximately 79 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
G protein-coupled receptor kinases (GRKs) are important modulators of G protein-coupled receptor (GPCR) signaling. Receptor phosphorylation by specific GRKs plays a key role in triggering rapid desensitization. The GRK family consists of 7 isoforms that share a central catalytic domain with homology to other serine/threonine kinases. The catalytic domain is flanked by an amino-terminal RGS domain of 183‑188 amino acids and a carboxyl-terminus of variable length. GRK2 is a member of the beta ARK subfamily, and was originally termed beta -adrenergic receptor kinase 1 ( beta ARK1).
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