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Immunofluorescence procedure (paraffin section) - direct method

A. Required solutions and reagents

    1. Phosphate buffer: 0.1M 1X PBS (pH 7.4)

    2. Fixing solution: 4% paraformaldehyde solution (no methanol)

    3. Antibody dilution: 1% BSA, 0.03% Proclin300 in 0.1 M PBS

    4. Antigen repair solution: sodium citrate buffer

    5. Closed normal goat serum (stock solution)

    6. DAPI dyeing solution

    7. Immunofluorescence anti-quenching tablets

B. Steps

    1. 60 ° C baked 2 hours

    2. Dewaxing. Dewaxed in xylene for 15 minutes, three times

    3. Hydration. Pass through absolute ethanol, 95%, 90%, 80%, 70%, each 5 minutes, distilled water (or

Come water) 5 minutes

    4. Wash PBS for 5 minutes, three times

    5. Antigen retrieval. Boiling in citrate buffer (about 92-95 ° C)

Bath) Repair for 15 minutes, naturally cool to room temperature. Wash in PBS for 5 minutes, three times

    6. Normal goat serum is blocked, 37 ° C for 20 minutes

    7. Wash PBS for 5 minutes, three times

    8. Incubate with primary antibody and act for 1.5 hours at 37 °C (concentration of incubation antibody, time of action through pre-experiment

Decide).

    9. Wash PBS for 10 minutes, three times

    10. DAPI counterstained nuclei, diluted 1:1000, for 5 minutes at room temperature.

    11. Wash in PBS for 5 minutes, three times

    12. Anti-quenching fluorescent sealant seals, observed under the microscope.