Table I. Identified proteins.

Fraction	Proteins identified	Protein SILAC ratio	Protein SILAC ratio (%)	Peptides identified	Razor peptides	Unique peptides	Proteins with >5 valid values
1	1481	1480	99.93	10,410	9849	9370	1389
2	1972	1969	99.85	14,400	13,673	13,044	1823
3	2035	2029	99.71	15,104	14,379	13,748	1866
4	2087	2076	99.47	15,422	14,799	14,256	1823
5	2055	2052	99.85	15,253	14,647	14,114	1814
6	2112	2101	99.48	15,407	14,767	14,201	1848
7	2041	2038	99.85	14,047	13,429	12,892	1781
8	1946	1944	99.90	13,728	13,101	12,551	1703
9	2126	2119	99.67	14,477	13,859	13,315	1827
Total	2703	2698	99.82	26,961	25,969	25,081	1981

Table indicates the numbers of proteins identified in total and in each of the purification fractions of MS measurements before and after filtering for at least five valid values in all nine fractions, as well as the number and percentage of proteins identified with the SILAC ratio and the numbers of peptides, unique peptides, and razor peptides in each fraction.