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Preparation and Storage
推奨アッセイ手順
FITC Rat Anti-Mouse IgG2a/2b may be used as a primary or secondary reagent in immunofluorescent staining.
IMMUNOFLUORESCENT STAINING OF INTRACELLULAR IMMUNOGLOBULIN (Ig) PROTOCOL
1. Prepare a single-cell suspension and determine cell number.
2. Suspend cells in staining buffer (PBS + 2% FBS + 0.1% Sodium Azide) at 2 × 10^7 cells/ml and transfer to U-bottom microwell plates in 50 µl/well for immunofluorescent staining.
Note: Stain Buffer (FBS) (Cat. No. 554656) is effective for use as a staining buffer in this protocol.
3. Block Fcγ receptors by adding 0.2 µg of Purified Rat Anti-Mouse CD16/CD32 (Mouse BD Fc Block™)
(Cat. No. 553141/553142) in 50 µl of staining buffer to each well.
4. Incubate 5 minutes on ice.
5. Add 200 µl of staining buffer/well and resuspend cells. Centrifuge at 250 × g for 5 minutes and aspirate supernatant.
6. Block surface Ig with Purified Rat Anti-Mouse IgG2a/2b (Cat. No. 553397) by adding 1.0 µg per sample in 50 µl of staining buffer/well.
Note: Surface markers may be stained during this step as described in the "Immunofluorescent Staining of Mouse and Rat Leukocytes for Flow Cytometry" under protocols in "Multicolor Flow" at our website: http://www.bdbiosciences.com/us/s/resources
7. Incubate 15 minutes on ice.
8. Wash 2x as described in Step 5.
9. Resuspend cells in 100 µl of BD Cytofix/Cytoperm™ intracellular staining buffer (BD Cytofix/Cytoperm™ Kit, Cat. No. 554714) per well.
10. Incubate 30 minutes at room temperature.
11. Wash 2x with 200 µl of 1x Perm/Wash Buffer (provided in the BD Cytofix/Cytoperm Kit) per well. Centrifuge at 250 × g for 5 minutes and aspirate supernatant between washes.
12. Stain intracellular Ig by adding ≤ 1 µg of FITC-conjugated R2-40 mAb in 50 µl of 1 × Perm/Wash Buffer/well.
Note: Other antibodies recommended for staining of intracellular markers may be added during this step as described in Step 12.
13. Incubate for 30 minutes at room temperature.
14. Wash 2x as described in Step 11.
15. Resuspend and transfer samples in 100 µl of staining buffer to tubes appropriate for analysis with a flow cytometer. Bring volume in each tube to 400 µl with staining buffer.
16. Analyze samples on a flow cytometer.
Product Notices
- Since applications vary, each investigator should titrate the reagent to obtain optimal results.
- An isotype control should be used at the same concentration as the antibody of interest.
- 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.
- For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
- Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
関連製品
The R2-40 monoclonal antibody specifically recognizes a common epitope, probably located in the CH1 domain, shared by mouse IgG2a, and IgG2b, of Igh-Ca and Igh-Cb haplotypes. It does not react with other Ig isotypes.
Development References (1)
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Benson MJ, Dillon SR, Castigli E, et al. Cutting edge: the dependence of plasma cells and independence of memory B cells on BAFF and APRIL.. J Immunol. 2008; 180(6):3655-9. (Biology). View Reference
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For Research Use Only. Not for use in diagnostic or therapeutic procedures.