Description
The 14/Beta-Catenin monoclonal antibody specifically binds to Beta-Catenin (β-Catenin). β-Catenin is a 92 kDa protein that binds to the cytoplasmic tail of E-Cadherin. The cadherins, transmembrane adhesion molecules, are found with catenins at adherens junctions (zonula adherens). Deletions in the cytoplasmic domain of E-Cadherin which eliminate catenin binding also result in a loss of cell adhesion, indicating that this binding is essential for E-Cadherin function. Although the α- and β-Catenins have been cloned, very little is known about their biochemical roles. However a link between β-Catenin and colon cancer has been described. β-Catenin was found to co-immunoprecipitate with the APC tumor suppressor protein in human colorectal tumor cell lines, as well as in human kidney 293 cells. E-Cadherin, however, was not detectable in these complexes. Thus the APC-Catenin complex may be affecting the transmission of contact inhibition signals and/or the regulation of cell adhesion.
Recommended Assay Procedure for Bioimaging: http://www.bdbiosciences.com/support/resources/protocols/ceritifed_reagents.jsp 1. Seed ~10,000 cells in appropriate culture medium in a BD Falcon™ 96-well Imaging Plate (Cat. No. 353219) and culture overnight. 2. Remove the culture medium from the wells and fix the cells by adding 100 µl of fresh 3.7% Formaldehyde in PBS or BD Cytofix™ Fixation Buffer (Cat. No. 554655) to each well and incubate for 10 minutes at room temperature (RT). 3. Remove the fixative from the wells, and permeabilize the cells using either cold methanol or Triton™ X-100. a. Add 100 μl of -20°C 90% methanol or -20°C BD Phosflow™ Perm Buffer III (Cat. No. 558050) to each well and incubate (5 min, RT). OR b. Add 100 µl of 0.1% Triton™ X-100 (Sigma-Aldrich Cat. No. X-100) to each well and incubate (5 min, RT). 4. Remove the permeabilizer from the wells, and wash wells twice with 100 μl of 1× PBS. 5. Remove the PBS and block the cells by adding 100 μl of blocking buffer, eg, BD Pharmingen™ Stain Buffer (FBS) (Cat. No. 554656) or 3% FBS in 1× PBS to each well and incubate (30 min, RT). 6. Meanwhile, put 5 ul (1 test size) Bioimaging Certified fluorescent antibodies into 45 ul of Stain Buffer; protect from light. 7. Remove the blocking buffer and add 50 μl of prepared fluorescent antibody per well and incubate (60 min, RT), protect from light. 8. Remove the fluorescent antibody and wash the wells three times with 100 μl of 1× PBS. 9. Remove the PBS and counterstain the nuclei by adding 100 µl of a 2 µg/ml solution of Hoechst 33342 (Cat. No. 561908) in 1× PBS to each well at least 15 minutes before imaging. 10. View and analyze the cells using an appropriate imaging instrument. Recommended filters for the BD Pathway™ Instruments are: Instrument Excitation Emission Dichroic BD Pathway™ 855 488/10 515 LP Fura/FITC BD Pathway™ 435 482/35 536/40 FF506
Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to Alexa Fluor® 488 under optimum conditions, and unreacted Alexa Fluor® 488 was removed.
1. This reagent has been pre-diluted for use at the recommended Volume per Test when following the Recommended Assay Procedure. A Test is typically ~10,000 cells cultured in a well of a 96-well imaging plate.
2. An isotype control should be used at the same concentration as the antibody of interest.
3. Alexa Fluor® 488 fluorochrome emission is collected at the same instrument settings as for fluorescein isothiocyanate (FITC).
4. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
5. The Alexa Fluor®, Pacific Blue™, and Cascade Blue® dye antibody conjugates in this product are sold under license from Molecular Probes, Inc. for research use only, excluding use in combination with microarrays, or as analyte specific reagents. The Alexa Fluor® dyes (except for Alexa Fluor® 430), Pacific Blue™ dye, and Cascade Blue® dye are covered by pending and issued patents.
6. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
7. Triton is a trademark of the Dow Chemical Company.
8. Alexa Fluor® is a registered trademark of Molecular Probes, Inc., Eugene, OR.
9. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
