{"product_id":"cst-26498s","title":"CST,  26498S, Ubiquityl-Histone H2A (Lys119) (D27C4) Rabbit Monoclonal Antibody (Alexa Fluor® 488 Conjugate)","description":"Monoclonal Antibody for studying H2A.4 (Lys119) ubiquitinate. Validated for Immunofluorescence (Immunocytochemistry),Flow Cytometry (Fixed\/Permeabilized). Highly specific and rigorously validated in-house, Ubiquityl-Histone H2A (Lys119) (D27C4) Rabbit Monoclonal Antibody (Alexa Fluor\u003csup\u003e®\u003c\/sup\u003e 488 Conjugate) (CST #26498) is ready to ship.\n\n\u003cb\u003eProduct Usage Information\u003c\/b\u003e\nImmunofluorescence (Immunocytochemistry): 1:200\nFlow Cytometry (Fixed\/Permeabilized): 1:50\n\u003cb\u003eStorage\u003c\/b\u003e\nSupplied in PBS (pH 7.2), less than 0.1% sodium azide and 2 mg\/ml BSA. Store at 4°C. Do not aliquot the antibody. Protect from light. Do not freeze.\n\u003cb\u003eProtocol\u003c\/b\u003e\nAvailable protocols: Immunofluorescence (Immunocytochemistry), Flow Cytometry (Fixed\/Permeabilized)\n\u003cb\u003eSpecificity \/ Sensitivity\u003c\/b\u003e\nUbiquityl-Histone H2A (Lys119) (D27C4) Rabbit Monoclonal Antibody (Alexa Fluor\nSpecies Reactivity: Human, Mouse, Rat, Monkey\n\u003cb\u003eSource \/ Purification\u003c\/b\u003e\nMonoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human histone H2A protein in which Lys119 is mono-ubiquitinated.\n\u003cb\u003eBackground\u003c\/b\u003e\nThe nucleosome, made up of four core histone proteins (H2A, H2B, H3, and H4), is the primary building block of chromatin. Originally thought to function as a static scaffold for DNA packaging, histones have now been shown to be dynamic proteins, undergoing multiple types of posttranslational modifications, including acetylation, phosphorylation, methylation, and ubiquitination (1). Ubiquitin is a conserved 76 amino acid peptide unit that can be covalently linked to many cellular proteins by the ubiquitination process. Three components are involved in this protein-ubiquitin conjugation process. Ubiquitin is first activated by forming a thioester complex with the activation component E1; the activated ubiquitin is subsequently transferred to the ubiquitin-carrier protein E2, then from E2 to ubiquitin ligase E3 for final delivery to the epsilon-NH of the target protein lysine residue (2). Histone H2A is mono-ubiquitinated at Lys119 by the Polycomb Repressor Complex 1 (PRC1) and is critical for transcriptional silencing of the developmental genes and X chromosome inactivation (3-6). PRC1 is composed of Bmi1 and RING1A (also RING1 or RNF1), both of which act to enhance the E3 ubiquitin ligase activity of the catalytic subunit RING1B (also RING2 or RNF2) (3,4). Histone H2A is also mono-ubiquitinated at Lys119 at sites of DNA damage. This mono-ubiquitination event requires the PRC1 components Bmi1 and RING1B, in addition to another E3 ubiquitin ligase RNF8, and contributes to subsequent recruitment of the BRCA1 complex, via binding of RAP80\/UIMC1 (ubiquitin interactive motif containing 1 protein) (7-10).\n\u003cb\u003eAlternate Names\u003c\/b\u003e\nbA317E16.2; H2A clustered histone 1; H2A histone family, member R; H2A-clustered histone 1; H2A.4; H2A1A; H2AA; H2AC1; H2AFR; HIST1H2AA; histone 1, H2aa; histone cluster 1 H2A family member a; histone cluster 1, H2aa; Histone H2A type 1-A; Histone H2A\/r; TH2A\n\n\u003cb\u003eSpecification\u003c\/b\u003e\n\nREACTIVITY: H M R Mk\nSENSITIVITY: Endogenous\nSource\/Isotype: Rabbit IgG","brand":"CST","offers":[{"title":"Default Title","offer_id":46800366731433,"sku":"26498S","price":0.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/iright.com\/products\/cst-26498s","provider":"Iright","version":"1.0","type":"link"}