DAPI staining yeast

1. 1mL yeast + 0.1mL 36% formaldehyde. 1-2H/Rt
2. Wash 2x 1mL H₂O (Spin at 10K, 5" ok). May leave at 4^oC
3. To stain: Spind down and resuspend in 300 ul H₂O. Add 700 ul 100% EtOH. Leave for 30 min/Rt.
4. Spin down, resuspend 500 ul H₂O and sonicate 5 sec.
5. Spin down (10K, 5") and remove top 300 ul. Vortex.
6. To see, mix 4 ul cells and 4 ul Eileen's premade DAPI + mounting media on slide. Microscope immeidately or seal with nail polish & keep dark. **Must seal if you want to take pictures.
7. EILEEN'S Premade DAPI/mounting media:
   •50mg p-phenylenediamine (Sigma in 5mL 1X PBS; adjust to pH 9.0 (NaOH)
   •add 45mL glycerol & stir to homogeneity
   •add 2.25 ul 1mg/ml DAPI. Store -70^oC/dark
   [ ] f 45ug/ml DAPI
   use 1:1 to stain cells, ie 4 ul cells + 4 ul DAPI
   •Alt: Sonicate cells, mix in triton x100 (to 1% final) & seal immediately!