TABLE 1.

Numbers of analyzed positions and polymorphisms

ORFa	Coded protein or promoter	No. of analyzed codons		No. of probed polymorphisms
		Previous version	Improved version	Previous version	Improved version
P	Polymerase terminal protein (tp)	2	0	2 (deletions)	0
	Polymerase spacer (sp)	2	2	10	10
	Polymerase reverse transcriptase (rt)	26	66	70	197
S	Envelope (PreS1)	1	3	4	6
	Envelope (PreS2)	2	6	6	16
	Envelope (S)	54	98	150 (+3 deletions)	339
	Basal core promoter (BCP nucleotides)	15	33	38 (+16 deletions and insertions)	112
	PreCore (preC)	12	14	35 (+4 deletions)	55
	Core (C)	11	21	27 (+1 insertion and 1 deletion)	115
X	X	18	55	81 (+1 deletion)	144
Total		143	298	433	994

^aORF, open reading frame.