Nuclear stain for eukaryotic and prokaryotic cells
The cell-permeant SYTO® 59 nucleic acid stain exhibits bright red fluorescence upon binding to nucleic acids. In both live and dead eukaryotic cells, SYTO® 59 generally shows cytoplasmic or mitochondrial as well as nuclear staining. In addition, SYTO® 59 will stain most live and permeabilized bacteria.
This protocol can be used for:
- Nucleic acid (nuclear) staining in fluorescence microscopy
This protocol should not be used for:
- Flow cytometry
|1. Culture cells in an appropriate medium and vessel for fluorescence microscopy.|
|2. Remove the medium.|
|3. Wash the cells 1–3 times in a phosphate-free buffer to remove the medium.|
|4. Prepare the SYTO® 59 staining solution by diluting the stock solution 1:1,000 (5 µM) in a phosphate-free buffer.|
|5. Add sufficient staining solution to cover the cells.|
|6. Incubate for 30 minutes, protected from light.|
|7. Remove the staining solution.|
|8. Wash the cells 3 times in a phosphate-free buffer.|
|9. Image the cells.|
|Standard filter set||Cy®3.5|
|EVOS® Light Cube||Texas Red®|
- Warm to room temperature and briefly centrifuge the DMSO solution to the bottom of the vial each time before use.
- Try multiple dye concentrations in the range from 100 nM to 5 µM to determine the optimal concentration.
- In general, the best results are obtained in buffers that do not contain phosphate, such as Hank’s Balanced Salt Solution (14025092).
- Treat all nucleic acid binding dyes as potential mutagens and handle with care.
Nuclear staining of BPAECs. BPAECs were cultured, stained with SYTO® 59 dye (5 μM for 5 min), and then imaged.