Table 1.

Distribution of HERV-W elements.

		Proviruses	Solo LTRs		Pseudoelements
Intergenic		37	110		66
Intronic		10	43		29
p-value			0.508 a
	Total1	Expected*	Pro	Solo	Total2	Expected*	Pse	Expected*
Sense	21	43	3	16	19	28	2	14
Anti-sense	65	43	7	31	38	29	27	15
p-value	0.0005a		1.000b		0.087a		0.0008b

Distribution of three categories of HERV-W elements in genic/intergenic regions and distribution of intronic HERV-W elements on sense and anti-sense strands, respectively. ¹Total number of intronic HERV-W elements, ² indicates number of proviruses and solo LTRs. * indicate expected number based on random integration (i.e. 50% on each strand). Pro, solo and pse indicate proviruses, solo LTRs and pseudoelements, respectively. ^aChi-square test, ^bFisher's exact test. P-values <0.05 were considered significant.