CST, 31433S, Phospho-Rb (Thr821) (E6J1L) Rabbit Monoclonal Antibody

Monoclonal Antibody for studying Rb (Thr821) phosphate. Validated for WB,WB,IF,F. Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-Rb (Thr821) (E6J1L) Rabbit Monoclonal Antibody (CST #31433) is ready to ship. Product Usage Information Western Blotting: 1:1000 Simple Western™: 1:50 - 1:250 Immunofluorescence (Immunocytochemistry): 1:12800 - 1:25600 Flow Cytometry (Fixed/Permeabilized): 1:200 - 1:800 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/mL BSA, 50% glycerol, and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. For a carrier free (BSA and azide free) version of this product see product # 67545 . Protocol Available protocols: Western Blotting, Immunofluorescence (Immunocytochemistry), Flow Cytometry (Fixed/Permeabilized) Specificity / Sensitivity Phospho-Rb (Thr821) (E6J1L) Rabbit Monoclonal Antibody recognizes endogenous levels of Rb protein only when phosphorylated at Thr821. Reactivity for immunofluorescence is human only. Species Reactivity: Human, Mouse, Rat Source / Purification Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr821 of human Rb protein. Background The retinoblastoma tumor suppressor protein Rb regulates cell proliferation by controlling progression through the restriction point within the G1-phase of the cell cycle (1). Rb has three functionally distinct binding domains and interacts with critical regulatory proteins including the E2F family of transcription factors, c-Abl tyrosine kinase, and proteins with a conserved LXCXE motif (2-4). Cell cycle-dependent phosphorylation by a CDK inhibits Rb target binding and allows cell cycle progression (5). Rb inactivation and subsequent cell cycle progression likely requires an initial phosphorylation by cyclin D-CDK4/6 followed by cyclin E-CDK2 phosphorylation (6). Specificity of different CDK/cyclin complexes has been observed (6-8) and cyclin D1 is required for Ser780 phosphorylation (9). Alternate Names exon 17 tumor GOS561 substitution mutation causes premature stop; GOS563 exon 17 substitution mutation causes premature stop; OSRC; p105-Rb; p110-RB1; pp110; PPP1R130; pRb; prepro-retinoblastoma-associated protein; protein phosphatase 1, regulatory subunit 130; Rb; RB transcriptional corepressor 1; RB1; retinoblastoma 1; retinoblastoma suspectibility protein; Retinoblastoma-associated protein Specification REACTIVITY: H M R SENSITIVITY: Endogenous MW (kDa): 110 Source/Isotype: Rabbit IgG