Human B Cell Signaling Flow Cytometry Panel #31328
Product Information
Protocol
Product Description
The Human B Cell Signaling Flow Cytometry Panel can be used to interrogate activation of human B cells among peripheral blood mononuclear cells (PBMCs).
CD45 is a pan leukocyte marker. B cells are identified by expression of CD19. Engagement of the B cell receptor (BCR) triggers the tyrosine phosphorylation of CD79A at Tyr182, which is mediated by Src family kinases. Following engagement of the BCR, Syk is recruited to phosphorylated ITAM motifs within the BCR signaling complex, which facilitates Syk activation through phosphorylation of Tyr525/526 within the kinase activation loop.
CD45 is a pan leukocyte marker. B cells are identified by expression of CD19. Engagement of the B cell receptor (BCR) triggers the tyrosine phosphorylation of CD79A at Tyr182, which is mediated by Src family kinases. Following engagement of the BCR, Syk is recruited to phosphorylated ITAM motifs within the BCR signaling complex, which facilitates Syk activation through phosphorylation of Tyr525/526 within the kinase activation loop.
Product Usage Information
B cell receptor activation can be induced through treatment with Goat Anti-Human IgM, F(ab')2 Antibody (Low Endotoxin, Azide-free) #96232. All antibodies in this kit are compatible with the Intracellular Flow Cytometry Kit (Methanol) #13593 and can be used in a single staining mix on fixed and permeabilized cells. Prior to fixation and antibody incubation, we recommend adding a fixable viability dye such as the Ghost Dye Violet 510 Fixable Viability Dye #59863 to enable identification and exclusion of dead cells from analysis.
For individual product dilutions, refer to panel product datasheet or individual product pages.
Gating strategy for observing B cell receptor activation in B cell populations: Apply the same gating strategy for both untreated and treated cell populations. If a fixable viability dye was used, then first gate on viable cells. Next, gate on CD45+ immune cells. Viewing the CD45+ population, gate on singlets using appropriate scatter parameters, such as FSC-A vs. FSC-H. Observe CD19 vs. SSC-A and gate on CD19+ B cells. Observe phospho-CD79A (Tyr182) and phospho-Syk (Tyr525/526) within the CD19+ gate.
For individual product dilutions, refer to panel product datasheet or individual product pages.
Gating strategy for observing B cell receptor activation in B cell populations: Apply the same gating strategy for both untreated and treated cell populations. If a fixable viability dye was used, then first gate on viable cells. Next, gate on CD45+ immune cells. Viewing the CD45+ population, gate on singlets using appropriate scatter parameters, such as FSC-A vs. FSC-H. Observe CD19 vs. SSC-A and gate on CD19+ B cells. Observe phospho-CD79A (Tyr182) and phospho-Syk (Tyr525/526) within the CD19+ gate.
Storage
CD45 (HI30) Mouse mAb (violetFluor 450 Conjugate) is supplied in 10 mM NaH2PO4, 150 mM NaCl, 0.09% NaN3, 0.1% gelatin, pH 7.2. CD19 (Intracellular Domain) (D4V4B) XP® Rabbit mAb (Alexa Fluor® 647 Conjugate), Phospho-CD79A (Tyr182) (D1B9) Rabbit mAb (Alexa Fluor® 488 Conjugate), and Phospho-Syk (Tyr525/526) (C87C1) Rabbit mAb (PE Conjugate) are supplied in PBS (pH 7.2), less than 0.1% sodium azide, and 2 mg/mL BSA. Store at 4oC. Do not aliquot the antibodies. Protect from light. Do not freeze.
All components in this kit are stable in accordance with the date printed on the outer packaging label when stored at the recommended temperature. Please refer to product labels, datasheets, or web pages for specific “Best By” dates for each individual component.
All components in this kit are stable in accordance with the date printed on the outer packaging label when stored at the recommended temperature. Please refer to product labels, datasheets, or web pages for specific “Best By” dates for each individual component.
Specificity / Sensitivity
Each antibody in the Human B Cell Signaling Flow Cytometry Panel detects endogenous levels of its target protein. CD45 (HI30) Mouse mAb (violetFluor 450 Conjugate) detects an epitope within the extracellular domain. CD19 (Intracellular Domain) (D4V4B) XP® Rabbit mAb (Alexa Fluor® 647 Conjugate) detects an epitope within the intracellular domain. Phospho-CD79A (Tyr182) (D1B9) Rabbit mAb (Alexa Fluor® 488 Conjugate) recognizes endogenous levels of human CD79A protein only when phosphorylated at Tyr188. This corresponds to Tyr182 of mouse CD79A protein. Phospho-Syk (Tyr525/526) (C87C1) Rabbit mAb (PE Conjugate) detects endogenous levels of Syk protein only when phosphorylated at Tyr525/526 of human Syk. It also detects Syk protein when singly phosphorylated at Tyr526 of human Syk. It does not cross-react with other tyrosine-phosphorylated protein tyrosine kinases.
Species Reactivity:
Human
Source / Purification
Monoclonal antibodies were purified from tissue culture supernatant via affinity chromatography. The purified antibodies were conjugated under optimal conditions, with unreacted dye removed from the preparation.
限制使用
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For Research Use Only. Not For Use In Diagnostic Procedures.
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U.S. Patent No. 7,429,487, foreign equivalents, and child patents deriving therefrom.
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