Strain Thermo Scientific (now GE Dharmacon)
YSC6273-201920294
Mata YIL015W
http://dharmacon.gelifesciences.com/search/?term=YSC6273-201920294
Store in -80
Growth Protocols http://www.sigmaaldrich.com/technical-documents/protocols/biology/yeast…
Streak on YPD plate. Allow 48 hours at 30C.
Hemocytometers
InCyto C-Chip, DHC-N01-5 Neubauer improved
Fisher 22-600-100 50 for $90.78
Growth medium:
http://mcb.berkeley.edu/labs/koshland/Protocols/Media/yepdmedia1L.html
http://wahoo.cns.umass.edu/content/ypd
Per L:
in 900 mL H20. Autoclave
- 10 g yeast extract
- 20 g peptone
In 100 mL H2O. Filter sterilize
- 20 g glucose
Mix
Plates
http://mcb.berkeley.edu/labs/koshland/Protocols/Media/yepdplates.html
Per 100 mL:
- 1 g yeast extract
- 2 g peptone
- 2 g agar
- 90 mL water
autoclave.
- 10 mL 20% sterile filtered glucose
Ingredients:
http://mcb.berkeley.edu/labs/koshland/Protocols/YEAST/Arrestingyeast.ht…
http://www.zymoresearch.com/yeast/specialty-products/alpha-factor-matin…
http://www.sigmaaldrich.com/catalog/product/sigma/t6901?lang=en®ion=…
http://www.sigmaaldrich.com/catalog/product/sigma/h8627?lang=en®ion=…
Concentrations
ingredient | working conc | MW | stock |
---|---|---|---|
nocodazole | 0.015 mg/mL | 301 | 3 µL 33 mM (= 10 mg/mL) |
HU | 0.2 M | 76 | Koshand lab 2M in H2O |
alpha factor for BAR yeast | 3 µM | 1684 | Koshand lab 1mM in 1N HCl |
alpha factor for bar- yeast | 15 nM | " | " |
Calculations
- Nocodazole:
To make 50 mL YPD with 0.015 mg/mL nocodazole
25 (!) 3 µL aliquots 10 mg/mL noc
vi = (0.015 mg/mL * 50 mL)/10 mg/mL = 0.075 mL1.5 µL 10 mg/mL stock per mL medium
- Hydroxyurea: (Sigma H8267-1g)
To make 50 mL YPD with 0.2M HU
vi = (0.2M * 50 mL)/2M = 5 mL100µL 2M stock per mL medium
Buy 1 g, make 6.6 mL 2M stock
MW = 76, so 1 g = 1/76 mol = 0.0132 mol
vol = (1000 mL/2 mol) * 0.0132 mol = 6.6 mL
- alpha factor
To make 50 mL alpha factor at 3 µM from 1 mM stock
vi = (3 µM * 50 mL)/1000 mL = 0.15 mLCan buy 0.5 mg
To make 1mM stock from 0.5 mg
0.5 mg* (1 mmol/1684 mg) = 0.000297 mmol
vol = (1000 mL / 1 mmol) * 0.000297 mmol = 0.297 mL 0.1N HCl3 µL 1mM stock per mL of medium for 3 uM
0.015 uL 1mM stock per mL medium for 15 nM
Arrest protocol:
http://mcb.berkeley.edu/labs/koshland/Protocols/YEAST/Arrestingyeast.ht…
Allow 3 hours in drug to arrest.
morning before class
(An overnight culture may not be dense enough!!)
Start ~5 mL ON culture from plate. shake, no heat
9 am, day of class
10 am
- Aliquot 5 mL YPD into each of 4 tubes.
- Control. Do nothing
- Nocodazole. Add 7.5µL nocodazole stock
- HU. Add 500 µL stock
- alpha factor. Add 15 µL stock
- add enough cells to get slightly cloudy
- OD at 1 pm should be ~0.2
- So at 9 am, should be ~0.1
- incubate at RT in tube roller (from biochemistry)
Just before class
Check for concentration and clumpiness
- if necessary dilute
- sonicate (borrow sonicator from biochem) if necessary: 20% 30 sec 12:30 pm, just before class
Make 6 ~0.7 mL aliquots each culture into microfuge tubes
- One set of 4 per table.
- Each pair does all 4; table shares the samples.
- Printer-friendly version
- Log in to post comments