|Notch1 (D1E11) XP® Rabbit mAb 3608||20 µl||
||H M R||120, 300||Rabbit IgG|
|Cleaved Notch1 (Val1744) (D3B8) Rabbit mAb 4147||20 µl||
||H M R||110||Rabbit IgG|
|RBPSUH (D10A4) XP® Rabbit mAb 5313||20 µl||
||H M R Mk||61||Rabbit IgG|
|MAML1 (D3K7B) Rabbit mAb 12166||20 µl||
||H M R||130||Rabbit IgG|
|c-Myc (D84C12) Rabbit mAb 5605||20 µl||
||H M R||57-65||Rabbit IgG|
|p21 Waf1/Cip1 (12D1) Rabbit mAb 2947||20 µl||
||H Mk||21||Rabbit IgG|
|HES1 (D6P2U) Rabbit mAb 11988||20 µl||
||H M R Mk||30||Rabbit IgG|
|Cyclin D3 (DCS22) Mouse mAb 2936||20 µl||
||H M R||31||Mouse IgG1|
|Anti-rabbit IgG, HRP-linked Antibody 7074||100 µl||
|Anti-mouse IgG, HRP-linked Antibody 7076||100 µl||
Monoclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Pro2438 of human Notch1, the Val1754 cleavage site in human Notch1 (equivalent to Val1744 in mouse Notch1), residues surrounding Gln110 of human RBPSUH protein, residues surrounding Asp269 of human MAML1 protein, amino-terminal residues of c-Myc, residues near the carboxy-terminus of human p21, recombinant protein specific to human HES1 protein, residues 241-260 of recombinant human cyclin D3. Antibodies are purified by protein A and peptide affinity chromatography.
Notch proteins (Notch1-4) are a family of transmembrane receptors that play important roles in development and the determination of cell fate (1). Mature Notch receptors are processed and assembled as heterodimeric proteins, with each dimer comprised of a large extracellular ligand-binding domain, a single-pass transmembrane domain, and a smaller cytoplasmic subunit (Notch intracellular domain, NICD) (2). Binding of Notch receptors to ligands of the Delta-Serrate-Lag2 (DSL) family triggers heterodimer dissociation, exposing the receptors to proteolytic cleavages; these result in release of the NICD, which translocates to the nucleus and activates transcription of downstream target genes (3,4). RBPSUH (Recombining Binding Protein, SUppressor of Hairless), is the DNA-binding component of the transcription complex regulated by canonical Notch signaling. Binding of Notch with RBPSUH activates a transcription activation complex that includes Mastermind-like (MAML) proteins, leading to transcriptional activation of Notch target genes (5-7). The NICD binds and activates c-Myc which functions as a transcriptional regulator with roles in various aspects of cell behavior including proliferation, differentiation and apoptosis (8). The tumor suppressor protein p21 Waf1/Cip1 acts as an inhibitor of cell cycle progression. The NICD-RBPSUH complex binds and activates p21 for transcription (15). HES1 (Hairy and Enhancer of Split 1) is one of seven members of the HES family of basic helix-loop-helix (bHLH) transcription factors that is particularly well known as a repressive mediator of the canonical Notch signaling pathway (10). HES1 plays a key role in mediating Notch-dependent T cell lineage commitment (11), and has been reported to be an essential mediator of Notch-induced T cell acute lymphoblastic leukemia (T-ALL) (11,12). The active complex of cyclin D/CDK4 targets the retinoblastoma protein for phosphorylation, allowing the release of E2F transcription factors that activate G1/S-phase gene expression (13). Transcription of cyclin D is in part regulated by the NICD binding to the promoter region of cyclin D (14).
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