Table 5.

Distributions of cluster sizes. Results of clustering 11.4 million spectra from 14 runs of the Human dataset. The left side holds the cluster size distribution for 5.6 million spectra that passed spectral quality filtration and were grouped into 1.85 million clusters. The middle holds the distribution for the subset of clusters that were identified in the database search. The right hand side holds the distribution of “perfect” clustering, in which all the spectra belonging to a single peptide are grouped into a single cluster.

Clust. size	All Clusters				Identified Clusters				“Perfect” Clusters
	#Clust.	(%)	#Spec.	(%)	#Clust.	(%)	#Spec.	(%)	#Clust.	(%)	#Spec.	(%)
1	1275893	68.9%	1275893	22.7%	143487	53.6%	143487	8.9%	15830	24.6%	15830	1.0%
2	235387	12.7%	470774	8.4%	30993	11.6%	61986	3.8%	8027	12.5%	16054	1.0%
3–5	156917	8.5%	558491	10.0%	31008	11.6%	113935	7.1%	12474	19.4%	47641	3.0%
6–10	58085	3.1%	447501	8.0%	17902	6.7%	138702	8.6%	9447	14.7%	72646	4.5%
11–15	38758	2.1%	506373	9.0%	12484	4.7%	163030	10.1%	4905	7.6%	62629	3.9%
16–25	75335	4.1%	1290671	23.0%	26742	10.0%	461884	28.7%	5169	8.0%	101827	6.4%
26–50	6065	0.32%	210775	3.8%	2636	1.0%	91294	5.7%	4169	6.5%	146599	9.2%
51–100	2590	0.14%	179410	3.2%	1203	0.4%	82743	5.1%	2074	3.2%	143300	9.0%
101–500	1689	0.09%	332853	5.9%	832	0.3%	166587	10.3%	1820	2.8%	375502	23.5%
500+	373	0.02%	335727	6.0%	205	0.1%	187019	11.6%	403	0.6%	617369	38.6%
Total	1851092		5608468		267492		1610667		64318		1599397