Table 1.  Genes expressed in the same tissue tend to cluster along the chromosomes.					
	Total	Genes	Observed	Expected	
Gene Groupa	Genesb	Consideredc	Clusteredd	Clusterede	P Valuef
L1 Muscle-Enriched Genes	1364	1304	386	310.1	7.2X10-5
Sperm-Enriched Genes	650	616	198	112	<10-15
Oocyte-Enriched Genes	258	242	26	14.4	0.0174
Germline-Intrinsic Genes	508	475	136	67.9	<10-15
mountain 00	2703	2377	962	868.9	5.8X10-4
mountain 01	1818	1662	435	465.9	0.8936
mountain 02	1465	1100	360	270.6	<10-15
mountain 03	1363	1166	316	271.8	0.0017
mountain 04	1195	1113	466	268.2	<10-15
mountain 05	1012	944	248	160.7	<10-15
mountain 06	978	915	214	159.8	1.6X10-4
mountain 07	909	840	133	130.7	0.3243
mountain 08	810	761	225	119.8	<10-15
mountain 09	786	744	172	102.8	<10-15
mountain 10	635	555	97	64.8	0.0013
mountain 11	587	546	133	71.5	<10-15
mountain 12	462	435	86	35.9	<10-15
mountain 13	396	368	49	27.3	1.3X10-5
mountain 14	353	331	46	22.1	4.4X10-5
Oxidoreductases	323	317	21	16.7	0.2252
Transcription Factors	255	214	8	8.6	0.5558
"Lipid, Fatty Acid, and Sterol Metabolism Genes"	281	280	12	12.4	0.5329
aThe genes in each list are given in supplemental Table 1.					
bThe total number of genes considered					
"c The number of genes considered, after removing operons, putative tandem duplicates, and genes with uncertain genomic positions."					
dThe number of genes in the gene group that are within 10 kb of another gene from the same group.					
"eThe number of clusters expected due to random chance.  Shown are the average number of clustered genes from 10,000 repetitions of randomly selecting the same number of genes from the genome as the experimental gene group and counting how many genes are within 10 kb of another gene from the same randomly selected list."					
fThe probability that the observed number of genes that cluster could be matched or exceeded by chance.