|Detection of Human 53BP1 by Western Blot. Western blot shows lysates of U2OS human osteosarcoma cell line and HeLa human cervical epithelial carcinoma cell line. PVDF membrane was probed with 0.5 µg/mL of Goat Anti-Human 53BP1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1877) followed by HRP-conjugated Anti‑Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for 53BP1 at approximately 240 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.|
|53BP1 in Rat Kidney. 53BP1 was detected in perfusion fixed frozen sections of rat kidney using Goat Anti-Human 53BP1 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF1877) at 15 µg/mL overnight at 4 °C. Tissue was stained using the NorthernLights™ 557-conjugated Anti-Goat IgG Secondary Antibody (red; Catalog # NL001) and counterstained with DAPI (blue). Specific staining was localized to nuclei of epithelial cells in convoluted tubules. View our protocol for Fluorescent IHC Staining of Frozen Tissue Sections.|
The p53-binding protein 1 (53BP1) localizes to sites of damaged DNA and is phosphorylated by the ATM checkpoint kinase. 53BP1 is required for phosphorylation of other downstream ATM substrates, such as p53 and SMC-1, and therefore aids in nucleating a DNA damage response protein complex. Over aa 1614-1972, human 53BP1 shares 97% aa sequence identity with rat and mouse 53BP1.
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