Table 1. The modified optimum-solubility screen buffers.

No.	Buffer (100 mM)	pH
1	Glycine	3
2	Citric acid	3.2
3	Citric acid	4
4	Sodium acetate	4.5
5	Sodium acetate	5
6	Sodium phosphate	5.5
7	Sodium phosphate	6.5
8	Sodium phosphate	7.5
9	Potassium phosphate	5
10	Potassium phosphate	6
11	Potassium phosphate	7
12	Potassium phosphate	7.4
13	Sodium citrate	4.7
14	Sodium citrate	5.5
15	Bis-Tris	6
16	Bis-Tris	6.5
17	Bis-Tris	7
18	ADA	6.2
19	ADA	6.8
20	Bis-Tris propane	6.5
21	Bis-Tris propane	7
22	Bis-Tris propane	8
23	Bis-Tris propane	8.5
24	Ammonium acetate	7
25	Ammonium acetate	7.5
26	MOPS	7
27	HEPES	7
28	HEPES	7.5
29	HEPES	8
30	Tris	7.5
31	Tris	8
32	Tris	8.5
33	MES	5.8
34	MES	6.2
35	MES	6.5
36	Bicine	8.5
37	Bicine	9
38	(H)EPPS	8
39	Imidazole	8
40	CHES	9
41	CHES	9.5
42	CAPS	10
43	PIPES	6.5
44	TAPS	8.5
45	Cacodylate	6.5
46	PIPPS (polyisoprenyl phosphate)	3.7
47	Sodium formate
48	Sodium sulfate
49	Lithium chloride
50	Magnesium chloride
51	Calcium chloride
52	Potassium chloride
53	Ammonium chloride