TABLE 2.

Percentages of DNA sequence similarity among UTRs of TERV and other avian retroviruses

Virusb	% Similaritya to TERV region:
	U3	TATA box	TATA to R	R	U5	PBS	MΨc	dr1d
RSV	37.42	85.71	67.74	81.82	85.57	100.00	80.40	88.65
FuSV	42.11	100.0	67.74	82.07	87.88	100.00	80.27	57.85
AMV	35.18	71.42	48.39	78.26	80.43	100.00	73.78	86.58
Y73	42.12	85.71	64.52	86.36	81.59	100.00	79.59	88.49
RAV-0	67.86b	100.0	77.42	90.91	89.03	100.00	NDe	88.62
ART-CH	32.44	100.0	65.71	62.73	44.07	100.00	31.35	44.24
EAV-HP	35.22	85.71	45.16	62.73	44.06	100.00	33.68	47.78
EAV-0	32.59	100.0	69.58	90.91	66.30	100.00	ND	ND

^aPercent similarities were calculated using uncorrected P distances ([1 − P]100). Boldface numbers indicate the greatest similarity to TERV. 

^bFuSV, Fujinami sarcoma virus; AMV, avian myeloblastosis virus; Y73, avian sarcoma virus Y73. 

^cMΨ comparisons for RSV, FuSV, AMV, and Y73 are based on the alignment presented in Banks and Linial (2). 

^dThe dr1 sequence (117 bp) is located adjacent to the 5′ end of the PPT. 

^eND, no data were available for comparison.