Table 1. HIV-1 subtype classification by gene region of HIV-1 Iranian sequences from the HIV databases (www.hiv.lanl.gov).

	HIV-1 Genes
Subtype Number (%)	pol	env	gag	Full-length genome
	CRF_35AD 144 (82.8%)	CRF_35AD 100 (62.1%)	CRF_35AD 101 (77.7%)	CRF_35AD 9 (90.0%)
	CRF_AE 2 (1.1%)	CRF_AE 1 (0.6%)	–	AE 1 (10.0%)
	–	–	A1 2 (1.5%)	–
	B 25 (14.4%)	B 54 (33.5%)	B 27 (20.7%)	–
	CRF_29BF 2 (1.1%)	–	–	–
	C 1 (0.6%)	C 6 (3.7%)	–	–
Total	174	161	130	10