Post-processing of arrays
Peter Hauser (last update 12.3.2002)
according to http://cmgm.stanford.edu/pbrown/protocols/index.html
Procedures
- Mark boundaries of array on the back of the slide using the diamond scriber
- Caveat: Array blocks become invisible after post-processing!
- Fill bottom of humid chamber with 1X SSC
- Place the slides upside-down on the humid chamber and close the lid
- Let the spots re-hydrate until they glisten (5 to 15 min, you may incubate shorter using higher temperature)
- Snap-dry the arrays (1-3 sec) on an inverted heat-block at 75°
- Place the arrays into slide rack
- Pipette 15 ml of the sodium borate solution into a 50 ml Falcon tube
Blocking solution:
- Dissolve 6 g succinic anhydride in approximately 325-350 ml 1-Methyl-2-pyrrolidinone
- Immediately after the succinic anhydride has dissolved, add 15 ml sodium borate solution and mix thoroughly
- Immediately after both solutions are mixed, pour solution into an empty slide chamber
- Plunge slide rack rapidly and evenly in solution and shake vigorously up and down for few seconds
- Mix on an orbital shaker for 15-20 min
- Meanwhile heat water in another slide chamber to boiling
- Gently plunge the slide rack in 95°C water (just stopped boiling) for 2 min
- Plunge slide rack 4-5 times into 95% ethanol
- Centrifuge slides (e.g. in 50 ml Falcon tubes, leave the tubes open) at 600 rpm for 3 min
- Use arrays or store them in a slide box
Materials:
Humid chamber | Sigma Cat. No. H6644 |
Inverted heat block | |
Diamond scriber | VWR Cat. No. 52865-005 |
Slide rack | |
Slide chambers | Shandon Lipshaw Cat. No. 1 (microwave safe) |
Succinic anhydride | Aldrich Cat. No. 23, 969-0 |
1-Methyl-2-pyrrolidinone | Aldrich Cat. No. 32, 863-4 |
Sodium borate 1M, pH=8.0 dissolve 6.18g boric acid in ~80ml H2O adjust pH to 8.0 with 1N NaOH adjust volume to 100ml |
|
Ethanol 95% |