mouse monoclonal IgG1; CBP Antibody (C-1) is an IgG1 κ mouse monoclonal CBP antibody (also designated CREBBP antibody or KAT3A antibody) that detects the CBP protein of mouse, rat and human origin by WB, IP, IF, IHC(P) and ELISA. CBP Antibody (C-1) is available as both the non-conjugated anti-CBP antibody form, as well as multiple conjugated forms of anti-CBP antibody, including agarose, HRP, PE, FITC and multiple Alexa Fluor® conjugates. Cyclic AMP-regulated gene expression frequently involves a DNA element designated the cAMP-regulated enhancer (CRE). Many transcription factors bind to this element, including the protein CREB, which is activated as a result of phosphorylation by protein kinase A. It has been shown that protein kinase A-mediated CREB phosphorylation results in its binding to a nuclear protein designated CBP (for CREB-binding protein). These findings suggest that CBP has many of the properties expected of a CREB co-activator. Another high molecular weight transcriptional adapter protein, designated p300, is characterized by three cysteine- and histidine-rich regions, of which the most carboxy terminal region specifically binds the adenovirus E1A protein. p300 molecules lacking an intact E1A binding site bypass E1A repression, even in the presence of high concentrations of E1A. Sequence analysis of CBP and p300 has revealed substantial homology, arguing that these proteins are members of a conserved family of co-activators.