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Bethyl Laboratories, Inc.

Antibodies to Proteins Involved in
Notch Signaling

February 2010

Overview

Notch signaling plays a central role in cell fate determination during embryogenesis and adult tissue homeostasis (1 and 2). The mechanism of Notch signaling is highly conserved and consists of Notch receptors and transmembrane ligands which reside on neighboring cells and interact to achieve cell-to-cell communication. Signaling via the Notch pathway is iterative and functions in a variety of developmental events (2). The canonical Notch signaling pathway begins at the cell surface where an interaction between Notch and one of its ligands, such as Delta or Serrate on the surface of a neighboring cell, engages the Notch receptor to undergo a proteolytic event. Cleavage of the Notch receptor results in the release of the notch intracellular domain (NICD) from the membrane. The NICD translocates into the nucleus where it assembles into a transcriptional activation complex with RBP_J (also known as CSL or C-promoter binding factor) and Mastermind-like coactivator proteins for the regulation of gene expression. The critical role of notch signaling during development has been demonstrated in variety of model organisms such as flies, worms, and mice. In these organisms deficiencies in the Notch pathway result in embryonic lethality. In humans several diseases have been linked to defects in genes involved in notch signaling. Human T-cell acute lymphoblastic leukemia has been found to be caused by gain-of-function mutations in the Notch1 receptor leading to activation and oncogenic activity (3). The requirement of Notch signaling during development as well as the association between Notch signaling and human diseases establishes this pathway as a critical subject of study.

Selected Reviews
1. Wendy R. Gordon, Kelly L. Arnett, and Stephen C. Blacklow. The molecular logic of Notch signaling: a structural and biochemical perspective. J Cell Sci. (2008) October 1; 121(Pt 19): 3109–3119.
2. Ulla-Maj Fiúza and Alfonso Martinez Aria s. Cell and molecular biology of Notch. Journal of Endocrinology (2007) 194:459-474.
3. Jon C. Aster , Warren S. Pear , Stephen C. Blacklow. Annu Rev Pathol. Notch signaling in leukemia. (2008) 3:587-613.


Bethyl Laboratories' Portfolio



Detection of Human Notch1 by WB and IP.


Samples: Whole cell lysate from HeLa (5, 15 and 50 mcg for WB; 1 mg for IP, 20% of IP loaded) and 293T (T; 50 mcg) cells.  Antibodies: Affinity purified rabbit anti-Notch1 antibody A301-895A used for WB at 0.1 mcg/ml (A) and 1 mcg/ml (B) and used for IP at 3 mcg/mg lysate. Notch1 was also immunoprecipitated by rabbit anti-Notch1 antibody A301-894A, which recognizes an upstream epitope.  For detecting immunoprecipitated Notch1, ReliaBLOT Reagents and Procedures (Cat. No. WB120) were used.  Detection: Chemiluminescence with exposure times of 30 seconds (A and B).



Detection of Human and Mouse HDAC2 by WB (h&m) and IP (h).

Samples: Whole cell lysate from HeLa (5, 15 and 50 mcg for WB; 1 mg for IP, 20% of IP loaded), 293T (T; 50 mcg) and mouse NIH3T3 (M; 50 mcg) cells.  Antibodies: Affinity purified rabbit anti-HDAC2 antibody A300-705A used for WB at 0.04 mcg/ml (A) and 1 mcg/ml (B) and used for IP at 3 mcg/mg lysate. HDAC2 was also immunoprecipitated by rabbit anti-HDAC2 antibody A300-704A, at 3 mcg/ml lysate. For detecting immunoprecipitated HDAC2, ReliaBLOT Reagents and Procedures (Cat. No. WB120) were used.  Detection: Chemiluminescence with exposure times of 30 seconds (A) and 3 seconds (B).

Search for Antibodies by Research Area
Bethyl Laboratories' portfolio of polyclonal antibodies commercially available includes over 3500 polyclonal antibodies to over 1300 proteins. We test our antibodies in a wide range of applications including ELISA, western blot, immunoprecipitation, immunohistochemistry, and immunocytochemistry. We have recently validated many of our antibodies for flow cytometry and ChIP. Our antibody range also includes secondary antibodies, loading controls and antibodies to epitope tags.

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