Buffers and stocks



Buffers and stocks

TEB (T antigen extraction buffer) [1 % NP-40, 10 % glycerol, 137 mM NaCl, 20 mM Tris pH7.5]

50 % glycerol 20 ml

5M NaCl 2.74 ml

1M Tris pH 7.5 2 ml

NP-40 1 ml

Water up to 100 ml final volume

20xTBE (Tris-Borate-EDTA) 2 l 0.5 l

Tris- Base 432 g 60.5 g

Boric acid 220 g 30.9 g

0.5M EDTA pH 8.0 160 ml 3.7 g solid

50xTAE (Tris-acetate-EDTA) 0.25 l

Tris-Base 60.5 g

Glacial acetic acid 14.3 ml

0.5 M EDTA pH 8.0 25 ml

0.5 M EDTA pH8.0 0.5 l

EDTA, 2H2O 93.05 g

Water 400 ml

NaOH, pellets appr. 10 g

Adjust pH to 8.0, then finally volume to 0.5 l. EDTA will not go into solution until pH approaches 8.0

1M Tris pH 8.0 0.5 l

Tris-base 60.5 g

Adjust pH to 8.0 with conc. HCl then volume

5M NaCl 0.1 l 0.5 l

NaCl 29.2 g 146 g

Water 80 ml 400 ml

When all NaCl is dissolved, adjust volume

10x Running buffer (SDS-PAGE) 1 l 4 l

Tris-Base 30.31 g 121.24 g

Glycine 150 g 600 g

SDS 10 g 40 g

1M Tris pH 6.8 0.25 l

Tris-Base 30.29 g

Water 0.2 l

Adjust pH to 6.8, then volume. Need approximately 20 ml conc HCl !!!

1M Tris pH 8.8 0.25 l

Tris-Base 30.3 g

Water 0.2 l

Adjust pH to 8.8, then volume. Need approximately 5 ml conc HCl.

2.5M CaCl2 (Store at –20˚C) 20 ml

CaCl2, 2H2O 7.351 g

Water 15 ml

When all is dissolved, adjust volume to 20 ml, then aliquot.

2xBES (Transfection reagent) 0.2 l 2.5 l

BES, Na salt 2.352 g 29.4 g

NaCl 3.273 g 40.913 g

Na2HPO4, 2H2O (1.5 mM) 0.0534 g 0.6675 g

Note how much crystal water the Na2HPO4 has !

Adjust pH to 6.95 precisely (calibrate pH meter carefully), then volume. Check pH again. Filter sterilize and freeze aliquots.

TE pH 7.5 0.1 l

1M Tris pH7.5 1 ml

0.5 M EDTA pH8.0 0.2 ml

Water up to 0.1 l

10x loading dye (DNA gels) 10 ml

Bromophenol blue 0.025 g

Xylene cyanol 0.025 g

Ficoll 400 2.5 g

Water up to 10 ml

Keep stirring until dissolved!

12.5M NaOH 0.1 l

NaOH pellets 50 g

Dissolve in 80 ml of water (careful !, very caustic !), allow to cool, then adjust volume to 0.1 l

10% SDS 0.1 l

SDS 10 g

Water 80 ml

After SDS is dissolved, adjust volume to 0.1 l

10x transfer buffer (Western) 0.5 l 2 l

Tris-Base 15 g 60 g

Glycine 72 g 288 g

When ready to use, mix 1 volume 10x buffer, 7 volumes water, and 2 volumes methanol. Store et 4 ˚C.

10xTBS Tween 0.5 l

1M Tris pH 7.5 0.25 l

5M NaCl 0.15 l (or 43.83 g NaCl powder)

Tween-20 2.5 ml

Adjust volume to 0.5 l after stirring.

3M NaAc, pH 5.5 0.1 l

NaAc, 3H2O 40.8 g

Water 70 ml

(Note how much crystal water the NaAc has !, e.g. it may be anhydrous)

Adjust pH with glacial acetic acid, then volume to 0.1 l

2xDB (dissociation buffer, or Laemmli buffer) 20 ml

SDS 1 g

50 % glycerol 10 ml

1M Tris pH 6.8 1.25 ml

Bromophenol blue until 0.0075 %

Water up to 20 ml final volume

Aliquot into 1 ml portions and freeze. Before use, add 50 µl b-mercaptoethanol to a 1 ml aliquot.

TFB (transformation buffer, Hanahan)0.5 l

KCl 3.7 g

MnCl2, 4H2O 4.45 g

CaCl2, 2H2O 0.75 g

Hexammin cobaltchloride 0.4 g

K-MES 10 ml of 0.5 M stock pH 6.3

LB medium

Bacto tryptone 10 g

Bacto yeast extract 5 g

NaCl 10 g

Adjust pH to 7.0 with NaOH

LB/ agar plates

Make LB medium as described above. Add 15g/l of Bacto agar (it will not dissolve). Autoclave immediately! Right after autoclaving, place in 55˚C water bath. Pour plates after it is temperature equilibrated.

LB/ampicillin agar plates

Make LB/ agar as described above. Place in 55˚C water bath. After temperature has adjusted to 55˚C, add ampicillin from a 100mg/ml stock to a final concentration of 100µg/ml. Pour plates.

20xSSC [3 M NaCl, 0.3 M Na citrate pH 7] 2 l

NaCl 350.64 g

Na citrate, 2H2O 176.46 g

1 M Na2CO3 50 ml

Na2CO3 (anhydrous) 5.3 g

Water until 50 ml

0.1 M Na3VO4 10 ml

Na3VO4 0.183 g

Water until 10 ml

Aliquot and freeze

100 mM IPTG 10 ml

IPTG 0.238 g

Water until 10 ml

Freeze in 1 ml aliquotes

NETN buffer (GST fusions)

20 mM Tris pH 8.0

100 mM NaCl

1 mM EDTA

0.5 % NP-40

EBC extraction buffer

50 mM Tris pH 8.0

120 mM NaCl

0.5 % NP-40

Coomassie stain

0.25 % w/v Coomassie R250

10 % Acetic acid

50 % Methanol

Destain

7.5 % Acetic acid

5 % Methanol

Ponceau S stain

0.5 % Ponceau S in 5 % TCA (trichloro acetic acid)

10x PBS

NaCl 80g

KCl 2g

Na2HPO4 14.4g

KH2PO4 2.4g

Water 800 ml

Adjust pH to 7.4 then the volume to 1l. Sterilize by autoclaving

Ethidium Bromide Stock solution, 10 mg/ml

Ethidium Bromide 400 mg

Water 40 ml

Store at 4 ˚C

5x Laemmli Sample buffer

SDS 1.5g

1M Tris pH 6.8 3.75ml

Bromophenol blue 0.015g

DTT 1.16g

Glycerol 7.5ml

Mix thoroughly with stirring. Add water until 15ml total volume. Make 1ml aliquots and store at -20˚C.

1M MgCl2

MgCl2, 6H2O 10.17g

Water 50ml final volume

0.5M NaF

NaF 2.10g

Water 100 ml final volume

100 mM PMSF (phenylmethanesulfonyl fluoride)

PMSF 0.174g

2-propanol 10 ml final volume

Store at room temperature

RIPA buffer

50 mM Tris pH 8.0

150 mM NaCl

1% NP-40

0.5% sodium deoxycholate

0.1% SDS

CSK (Cytoskeleton buffer)

10mM PIPES pH7.0

100mM NaCl

300mM Sucrose

3mM MgCl2

0.5M EGTA

19.02 g EGTA Na salt

Distilled water to 90ml

Adjust pH to 7.00 with NaOH, then volume to 100ml

1M DTT

1.54 g dithiothreitol (DTT)

33.3 µl 3M NaAc (pH 5.3)

Distilled water to 10 ml final volume. Filter sterilize and store at -20˚C in 1 ml aliquots.

0.5M LiCl/ 20 mM Tris pH 7.5

2.12 g LiCl (anhydrous)

2 ml 1 M Tris pH 7.5

Distilled water to 100 ml final volume. Store at 4˚C

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