BD Pharmingen™ FITC Rat Anti-Mouse IgA

FITC-conjugated C10-3 mAb may be used as a primary or secondary reagent in immunofluorescent staining.*

                                IMMUNOFLUORESCENT STAINING OF INTRACELLULAR

                                                  IMMUNOGLOBULIN (lg) 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 x 10[7] cells/ml and transfer to U-bottom microwell plates in 50

      µl/well for immunofluorescent staining.

      Note: The BD Pharmingen. Stain Buffer with 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 2.4G2 antibody (Mouse BD Fc Block. purified anti-mouse CD16/CD32 mAb 2.4G2)

      (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 x g for 5 minutes and aspirate supernatant.

6.   Block surface Ig with purified C10-3 mAb (Cat. no. 556969) 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" in the Technical Protocols section of our website at                           http://www.bdbiosciences.com/pharmingen/protocols/Mouse_and_Rat_Leukocytes.shtml

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 µ1 of 1 x Perm/Wash buffer (provided in the BD Cytofix/Cytoperm Kit) per well. Centrifuge at 250x  g for 5 minutes and

       aspirate supernatant between washes.

12.  Stain intracellular Ig by adding ≤ 1 µg of FITC-conjugated C10-3 mAb in 50 µl of 1x 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.

1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
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.