Table 2. Summarized ranking of the most abundant proteins in Drosophila processing complexes.

Rank	CG	Protein	Detected	ΔAVE (%)
1	11 886	SLBP	12	17.2
2	12 924	Lsm11	12	11.6
3	9742	SmG	10	6.4
4	2097	Symplekin	12	4.1
5	1957	CPSF100	12	3.6
6	7698	CPSF73	12	2.9
7	18 591	SmE	10	2.5
8	4616	FLASH	12	2.3
9	5352	SmB	11	2.1
10	7697	CstF64	12	1.7
11	12 938	Lsm10	10	1.2
12	8427	SmD3	10	1.1
13	16 792	SmF	8	0.7
14	10 110	CPSF160	11	0.8
17	1109	WDR33	11	0.5
21	1078	Fip1	7	0.08
24	3642	CPSF30	5	0.06

The hierarchy is based on the value of ΔAVE (%) calculated for all 12 Drosophila experiments (see Supplementary Data for complete data and text for the method of calculation). Of the 12 experiments, 7 were carried out with pcB-dH3/5m and 5 with the dH3 duplex. Omitted from the list are proteins that were competed <50% by SL RNA and anti-U7 oligonucleotide (proteins 15, 18, 22 and 23), and/or were detected in <4 experiments (proteins 16, 19 and 20).