Intracellular Fixation/Permeabilization Buffer Kit(Ready To Use)

K082R

50T/100T/500T

2-8°C for 12 months

Intracellular Fixation/Permeabilization Buffer Kit has been formulated and optimized for staining intracellular antigens such as cytokines and chemokines.

1. Take 1×10⁶ cells in 100 μL suspension into the tube per sample.

2. [Optional] Stain cells with a Fixable Viability Dye (self-prepared).

3. [Optional] Block Fc receptors in cell suspensions according to experimental requirements.

4. Stain cell surface markers as need.

5. After incubating with the cell surface marker, add 1 mL of PBS (with 1% BSA, self-prepared) or Cell Staining Buffer [K079], centrifuge at 300×g for 5 min, discard the supernatant.

6. Resuspend the cells with 200 µL of PBS (with 1% BSA, self-prepared) or Cell Staining Buffer [K079]. Then add 200µL of Fixation Buffer, mix and incubate the cells at room temperature for 30~60 min in the dark (please extend the incubation time to 60 min when the room temperature is lower than 25°C). Centrifuge at 600×g for 5 min and discard the supernatant.

7. Add 1 mL of PBS (with 1% BSA) to each tube and mix fully, centrifuge at 600×g for 5 min and discard the supernatant.

Note: If it is too late to complete all steps, after adding PBS (with 1% BSA), the cells can be stored at 4 °C, and then centrifuged on the second day.

8. Resuspend the cells with 100 µL of Permeabilization Buffer. Add the appropriate volume of intracellular antibody or corresponding isotype control and incubate at least 30 min at room temperature in the dark.

9. Add 1 mL of PBS (with 1% BSA) or Cell Staining Buffer [K079] to each tube and centrifuge at 600×g for 5 min, discard the supernatant.

10. Resuspend the cells with appropriate PBS (with 1% BSA) or Cell Staining Buffer [K079], then analyze the samples by flow cytometry.