10 mM	HEPES pH 7.9
10%	glycerol
100 mM	NaCl
1.5 mM	MgCl2
0.05%	TritonX-100
Add just before use:
1 mM	DTT
200 µM	PMSF
1:1,000 dilution	Protease Inhibitor Cocktail (see Materials List)