X-gal Staining Protocol
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List reagents, supplies and equipment necessary to perform the protocol here. For those materials which have their own OWW pages, link to that page. Alternatively, links to the suppliers' page on that material are also appropriate.
- supply 1 (i.e. tubes of a certain size? spreaders?)
- reagent 1
- X μL reagent 2
- component A (reagent 2 is made up of multiple components)
- component B
- equipment 1
- equipment 2
(Bruce Conklin and David Sanan, Gladstone/UCSF) Materials:
* Potassium Ferrocyanide Crystalline (Fisher Scientific #P232-500 * Potassium Ferrocyanide Trihydrate (Fisher Scientific #P236-500) * Magnesium Chloride (Fisher Scientific #M33-500) * 1X PBS * X-gal (Boehringer Mannheim #745-740) * DMSO * 2% Formaldehyde 0.2% Gluteraldehyde in 1 X PBS * Superfrost/ Plus Microscope Slides (Fisher #12-550-15) * Pap pen (Electron Microscopy Sciences #22303) * Nuclear Fast Red ( also called Kernechtrot) * Gel Mount (Biomeda, M01) Solutions:
1) Solution A: 5mM Potassium Ferricyanide Crystalline 5mM Potassium Ferricyanide Trihydrate 2mM Magnesium Chloride in 1 X PBS (stored at 4 deg, protected from light, then warm to 37 degrees C prior to using)
2) X-gal Stock Solution (40X): 40 mg/ml in DMSO (100 mg in 2.5 ml DMSO) (store at -20 deg, protected from light)
3) Final X-gal Solution: Dilute X-gal stock solution 1:40 in Solution A. (first warm Solution A to 37 degrees C to prevent precipitation of X-gal)
4) Formalin/Glutaraldehyde fixative: 12.3 ml distilled water 10.0 ml 1% glutaraldehyde 2.7 ml formaldehyde stock (37%) 25.0 ml x2 saline buffer
1. Cut 10 micrometers cryostat sections onto pap-penned slides from fresh-frozen tissues. Immerse immediately into cold formaldehyde/gluteraldehyde 5 minutes, then rinse in dH20 for 60 seconds. 2. Let section dry completely onto slide 3. Rinse with 1X PBS 4. Apply Final X-gal Solution to sections and incubate at 37 deg; for 30 minutes to 24 hours (Check sections under microscope every 2 hours for development of blue staining) 5. Rinse with 1X PBS 6. Wash 2 X 2 with deionized H2O. 7. Counterstain 3 with Nuclear Fast Red 8. Wash as in step 6, then cover slip with Gel Mount
Relevant papers and books
- Goldbeter A and Koshland DE Jr. . pmid:6947258.
- JACOB F and MONOD J. . pmid:13718526.
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or instead, discuss this protocol.