Table 5. Transition/transversion ratio (R) in LTR and Env and non-synonymous (dN)/synonymous (dS) ratio in Env (±s.e.m.).

Virus/Cell type	R		dN/dS
	LTR	Env	Env
wt-MT4	1.489±0.147	1.3075±0.141	0.778±0.154
wt-C8166	1.729±0.144	1.776±0.147	0.831±0.248
mt-MT4	1.412±0.087	1.704±0.285	0.855±0.249
mt-C8166	1.543±0.260	1.517±0.193	0.855±0.187