Table 2.

The average selection acting on the HIV2 genome.

Region	Genes	Type	Selection
1	gag	Single	0.21
2	gag, pol	Double	0.51
3	pol	Single	0.24
4	pol, vif	Double	0.54
5	vif	Single	0.36
6	vif, vpx	Double	0.63
7	vpx	Single	0.28
8	vpr	Single	0.60
9	vpr, tat	Double	0.44
10	tat	Single	0.45
11	tat, rev	Double	0.70
12	env	Single	0.45
13	env, nef	Double	0.99
14	nef	Single	0.57

The average selection acting on each of the seven regions of the HIV2 genome, measured by weighing each expected mutation by its appropriate selection coefficient. Selection on double coding regions appears to tend to be more lenient