Description_x000D_ General description_x000D_ Monoclonal Anti-MDC1 (mouse IgG2a isotype) is derived from the hybridoma produced by the fusion of mouse myeloma cells (NS1 cells) and splenocytes from BALB/c mice immunized with a recombinant human MDC1 fragment. Mediator of DNA damage checkpoint protein 1 (MDC1) contains 2089 amino-acid residues with a predicted molecular weight of 226.4 kDa. The protein contains an FHA (forkhead-associated) domain at its amino terminus and two BRCT (BRCA1 carboxyl terminal) domains at its carboxy terminus._x000D_ Specificity_x000D_ Mouse monoclonal clone MDC1-50 anti-MDC1 antibody recognizes human and monkey MDC1._x000D_ Immunogen_x000D_ recombinant human MDC1 fragement (amino acids 2-200)._x000D_ Application_x000D_ Monoclonal Anti-MDC1 antibody produced in mouse has been used in:_x000D_ • enzyme-linked immunosorbent assay (ELISA_x000D_ • immunofluorescence_x000D_ • western blotting_x000D_ • immunoprecipitation_x000D_ • immunocytochemistry_x000D_ Physical form_x000D_ Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide._x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals._x000D_ Biochem/physiol Actions_x000D_ Genomic instability caused by the disruption of mechanisms that regulate cell-cycle checkpoints, DNA repair and apoptosis may lead to the development of cancer. ATM and ATR protein kinases are mediated to DNA damage sites by molecular adapters or mediators proteins such as Histone H2AX, Claspin and BRCTmotif containing molecules such as 53BP1, BRCA1, and MDC1 (mediator of DNA damage checkpoint protein 1). MDC1 interacts with the MRE11 complex (containing MRE11, RAD50 and NBS1 proteins). The MRE11 complex is involved in the detection repair and signaling of DNA damage. Upon ionizing radiation MDC1 is hyperphosphorylated by ATM and localizes to nuclear foci together with the MRE11 complex, phosphorylated H2AX and 53BP1. A radio resistant DNA synthesis (RDS) phenotype in cells is formed by down regulation of MDC1 protein expression by siRNA.