First Fixative Solution
| Reagent | Amount | Final concentration |
|---|---|---|
| Phosphate-buffered saline (10×) (e.g., Thermo Fisher AM9625) | 1 mL | 1× |
| Nuclease-free H2O | 7 mL | |
| Paraformaldehyde (20%) | 2 mL | 4% |
| Triton X-100 (10%) (e.g., Sigma-Aldrich 93443) | 30 µL | 0.03% |
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Prepare fresh.










