Table I. Chromosomal distribution of cis-NAT pairs.

Chromosome	Type of cis-NAT Pairsa								All Genes
	Type I		Type II		Type III		Total
	Pairs	%b	Pairs	%	Pairs	%	Pairs	%	Pairs	Genes
1	368	4.4	35	0.4	51	0.6	454	5.4	8,397	8,398
2	223	4.1	32	0.6	44	0.8	299	5.4	5,496	5,497
3	236	3.5	29	0.4	39	0.6	304	4.5	6,727	6,728
4	203	4.0	27	0.5	25	0.5	255	5.0	5,121	5,122
5	333	4.4	29	0.4	36	0.5	398	5.3	7,493	7,493
Total	1,363	4.1	152	0.5	195	0.6	1,710	5.1	33,234	33,239

^aType I, tail to tail (3′–3′); type II, head to head (5′–5′); type III, one transcript lies within another transcript.  ^bProportion of cis-NAT pairs in the transcript pairs of its corresponding chromosome.