CST, 3035S, NF-kappaB1 p105/p50 Antibody

Polyclonal Antibody for studying NFkB-p105. Validated for Western Blotting,Immunoprecipitation,Chromatin IP. Highly specific and rigorously validated in-house, NF-kappaB1 p105/p50 Antibody (CST #3035) is ready to ship. Product Usage Information For optimal ChIP results, use 10 μl of antibody and 10 μg of chromatin (approximately 4 x 10 6 cells) per IP. This antibody has been validated using SimpleChIP ® Enzymatic Chromatin IP Kits. Western Blotting: 1:1000 Immunoprecipitation: 1:50 Chromatin IP: 1:50 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation, Chromatin IP Specificity / Sensitivity NF-kappaB1 p105/p50 Antibody detects endogenous levels of the precurser protein p105 and its cleavage product p50. Species Reactivity: Human, Monkey Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to amino acids at the amino-terminus of human NF-kappaB p105. Background Transcription factors of the nuclear factor κB (NF-κB)/Rel family play a pivotal role in inflammatory and immune responses (1,2). There are five family members in mammals: RelA, c-Rel, RelB, NF-κB1 (p105/p50), and NF-κB2 (p100/p52). Both p105 and p100 are proteolytically processed by the proteasome to produce p50 and p52, respectively. Rel proteins bind p50 and p52 to form dimeric complexes that bind DNA and regulate transcription. In unstimulated cells, NF-κB is sequestered in the cytoplasm by IκB inhibitory proteins (3-5). NF-κB-activating agents can induce the phosphorylation of IκB proteins, targeting them for rapid degradation through the ubiquitin-proteasome pathway and releasing NF-κB to enter the nucleus where it regulates gene expression (6-8). NIK and IKKα (IKK1) regulate the phosphorylation and processing of NF-κB2 (p100) to produce p52, which translocates to the nucleus (9-11). Following IKK-mediated phosphorylation of p105 NF-κB at multiple sites (Ser921, 923, 927, and 932) on its carboxy-terminus, SCF/β-TrCP mediated processing produces the 50 kDa active form p50 (12,13). Alternate Names CVID12; DKFZp686C01211; DNA binding factor KBF1; DNA-binding factor KBF1; EBP-1; KBF1; MGC54151; NF-kappa-B; NF-kappa-B1; NF-kappaB; NF-kappabeta; NF-kB; NF-kB1; NFkappaB; NFKB-p105; NFKB-p50; NFKB1; NFKB1/p105; NFKB1/p50; nuclear factor kappa B subunit 1; nuclear factor kappa-B DNA binding subunit; Nuclear factor NF-kappa-B p105 subunit; Nuclear factor NF-kappa-B p50 subunit; Nuclear factor of kappa light polypeptide gene enhancer in B-cells 1; p105; p50 Specification REACTIVITY: H Mk SENSITIVITY: Endogenous MW (kDa): 50 Active form. 120 Precursor. SOURCE: Rabbit