The nuclear OXPHOS genes in insecta: a common evolutionary origin, a common cis-regulatory motif, a common destiny for gene duplicates

Table 2 Overview of the comparison of the OXPHOS genes

Species	Dros *	*Agam*	*Aaeg*	*Bmor*	*Amel*	*Tcas*	*Fugu*	*Zebra fish*	*Human*
	Orthologous genes
No of genes	68	68	68	68	63	67	68	68	68
One exon genes	8	10	7	6	3	9	0	0	0
No of exons^§	191	183	189	257	235	198	368	369	369
No of introns^§	122	114	119	187	171	129	300	301	301
No of introns^§ per gene	2.0	1.9	1.8	3.0	2.7	2.2	4.4	4.4	4.4
Av. intron size (bp)	173	199	3503	748	204	332	350	1181	2994
	Gene duplicates
Duplication events	34	8	4	7	2	3	25	22	24
One exon genes	121	3	2	3	0	2	0	0	4

*Dros. indicates the 11 Drosophilidae species. ^§ Only coding exons and introns between coding exons are considered. Species abbreviations as in Figure 1.

ISSN: 2730-7182