Table 1.

Number of clusters detected by Ciphergen Express software in all six fractions within the three M/z ranges analysed

	1.5–10 kDa	7–30 kDa	30–150 kDa	Total
pH 9	203	80	81	364
pH 7	178	65	44	287
pH 5	563	29	38	630
pH 4	440	23	33	496
pH 3	0	14	21	35
Organic wash	310	90	90	490
Total	1694	301	307	2302