Table II. Chromosomal locations and orientations of putative PC cis-NAT gene pairs.

Chromosome	Type of PC cis-NAT Pairsa
	Type I		Type II		Type III		Total
	Pairs	%b	Pairs	%	Pairs	%	Pairs	%
1	341	92.7	16	45.7	11	21.6	368	81.1
2	199	89.2	8	25.0	23	52.3	230	76.9
3	227	96.2	4	13.8	14	35.9	245	80.6
4	191	94.1	15	55.6	8	32.0	214	83.9
5	314	94.3	19	65.5	12	33.3	345	86.7
Total	1,272	93.3	62	40.8	68	34.9	1,402	82.0

^aType I, tail to tail (3′–3′); type II, head to head (5′–5′); type III, one transcript completely overlaps within the other transcript.   ^bPercentage of cis-NAT pairs of a certain type that are PC.