CST, 91787SF, HP1 alpha (F3K7M) Rabbit Monoclonal Antibody (BSA and Azide Free)

Monoclonal Antibody for studying HP1 alpha. Validated for Western Blotting,Immunofluorescence (Frozen),Immunofluorescence (Immunocytochemistry). Highly specific and rigorously validated in-house, HP1 alpha (F3K7M) Rabbit Monoclonal Antibody (BSA and Azide Free) (CST #91787) is ready to ship. Product Usage Information This product is the carrier free version of product #47573. All data were generated using the same antibody clone in the standard formulation which contains BSA and glycerol. This formulation is ideal for use with technologies requiring specialized or custom antibody labeling, including fluorophores, metals, lanthanides, and oligonucleotides. It is not recommended for ChIP, ChIP-seq, CUT&RUN or CUT&Tag assays. If you require a carrier free formulation for chromatin profiling, please contact us . Optimal dilutions/concentrations should be determined by the end user. BSA and Azide Free antibodies are quality control tested by size exclusion chromatography (SEC) to determine antibody integrity. Formulation Supplied in 1X PBS (10 mM Na 2 HPO 4 , 3 mM KCl, 2 mM KH 2 PO 4 , and 140 mM NaCl (pH 7.8)). BSA and Azide Free. For standard formulation of this product see product # 47573 Storage Store at -20°C. This product will freeze at -20°C so it is recommended to aliquot into single-use vials to avoid multiple freeze/thaw cycles. A slight precipitate may be present and can be dissolved by gently vortexing. This will not interfere with antibody performance. Specificity / Sensitivity HP1α (F3K7M) Rabbit mAb (BSA and Azide Free) recognizes endogenous levels of total HP1α protein. This antibody does not cross-react with HP1β or HP1γ protein. Non-specific labeling of the epithelia in testis may be observed in fixed frozen mouse tissue by immunofluorescence. Species Reactivity: Human, Mouse, Rat, Monkey Source / Purification Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human HP1α protein. Background Heterochromatin protein 1 (HP1) is a family of heterochromatic adaptor molecules involved in both gene silencing and higher-order chromatin structure (1). All three HP1 family members (α, β, and γ) are primarily associated with centromeric heterochromatin; however, HP1β and γ also localize to euchromatic sites in the genome (2,3). HP1 proteins are approximately 25 kDa and contain a conserved amino-terminal chromodomain, followed by a variable hinge region and a conserved carboxy-terminal chromoshadow domain. The chromodomain facilitates binding to histone H3 tri-methylated at Lys9, a histone "mark" closely associated with centromeric heterochromatin (4,5). The variable hinge region binds both RNA and DNA in a sequence-independent manner (6). The chromoshadow domain mediates the dimerization of HP1 proteins, in addition to binding multiple proteins implicated in gene silencing and heterochromatin formation, including the SUV39H histone methyltransferase, the DNMT1 and DNMT3a DNA methyltransferases, and the p150 subunit of chromatin assembly factor 1 (CAF-1) (7-9). In addition to contributing to heterochromatin formation and propagation, HP1 and SUV39H1 are also found complexed with retinoblastoma (Rb) and E2F6 proteins, both of which function to repress euchromatic gene transcription in quiescent cells (10,11). HP1 proteins are subject to multiple post-translational modifications, including phosphorylation, acetylation, methylation, ubiquitination, and sumoylation, suggesting various means of regulation (12-14). Alternate Names Antigen p25; CBX5; chromobox 5; chromobox homolog 5 (HP1 alpha homolog, Drosophila); Chromobox protein homolog 5; epididymis luminal protein 25; HEL25; Heterochromatin protein 1 homolog alpha; heterochromatin protein 1-alpha; HP1; HP1 alpha; HP1 alpha homolog; HP1-ALPHA; HP1A; HP1Hs alpha Specification REACTIVITY: H M R Mk SENSITIVITY: Endogenous MW (kDa): 25 Source/Isotype: Rabbit IgG