Description
The K112-91 monoclonal antibody specifically binds to Bcl-6. Bcl-6 was first identified as a proto-oncogene frequently deregulated by chromosomal translocations in non-Hodgkin B-cell lymphomas. It is a nuclear transcriptional repressor of the BTB/POZ zinc-finger family of transcription factors. In addition to its roles in cancer, Bcl-6 plays important roles in the differentiation of normal cells including B cells, thymocytes, CD4+ or CD8+ T cells. Bcl-6 is highly expressed in germinal center B cells, where it promotes the germinal center reaction by inducing proliferation and inhibiting the DNA-damage response. Bcl-6 has been identified as a key factor in promoting the differentiation of CD4+ follicular T helper (Tfh) cells that are involved in promoting germinal center formation and providing help to B cells. The interplay of Bcl-6 and another transcriptional repressor, Blimp-1, is thought to be critical in defining the results of both B-cell and T-cell differentiation.
This fluorescent antibody conjugate is suitable for intracellular staining of cell lines and primary cells fixed using BD Cytofix™ Fixation Buffer (Cat. No. 554655) or BD Phosflow™ Lyse/Fix Buffer (Cat. No. 558049) and permeabilized using BD Phosflow™ Perm/Wash Buffer I (Cat. No. 557885) or BD Phosflow™ Perm Buffers II (Cat. No. 558052), III (Cat. No. 558050) or IV (Cat. No. 560746). We validate the quality of each batch of the K112-91 antibody conjugate by flow cytometry on human cell lines. Investigators may use the same cell lines as controls for their staining procedure, namely Ramos (Positive; ATCC CRL-1596) and Jurkat (Negative; ATCC TIB-152) human cell lines actively growing in log phase (do not overgrow). Cells are fixed with BD Cytofix™ Fixation Buffer (Cat. No. 554655; 10 minutes at 37°C), permeabilized with BD Phosflow™ Perm Buffer III (Cat. No. 558050; 30 minutes on ice), and washed using BD Pharmingen™ Stain Buffer (Cat. No. 554656), followed by intracellular staining with Mouse anti-Bcl-6 for 45 minutes at room temperature.
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. We typically use 1 × 10^6 cells in a 100-µl experimental sample (a test).
2. An isotype control should be used at the same concentration as the antibody of interest.
3. 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.
4. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
5. Alexa Fluor® 488 fluorochrome emission is collected at the same instrument settings as for fluorescein isothiocyanate (FITC).
6. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
7. 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.
8. Alexa Fluor® is a registered trademark of Molecular Probes, Inc., Eugene, OR.
9. Species cross-reactivity detected in product development may not have been confirmed on every format and/or application.
10. Cy is a trademark of GE Healthcare.
11. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
