Table 2. Types of KoRV polymorphisms detected across 6 museum specimens of koalas.

	LTRs		gag leader		gag		pol		env		Total
Sequence length	505 bp		465 bp		1566 bp		3384 bp		1980
	Shared	Private	Shared	Private	Shared	Private	Shared	Private	Shared	Private	Shared	Private
Indels	0	0	2	0	0	0	0	0	0	0	2	0
Polymorphisms of which:	17	14	9	4	17	12	19	19	12	13	74	64
Non-coding	17	14	9	4	NA	NA	NA	NA	NA	NA	26	18
Coding region of which	NA	NA	NA	NA	17	12	19	19	12	13	48	44
Stop codon	NA	NA	NA	NA	0	0	0	1	1	1	1	2
Synonymous	NA	NA	NA	NA	8	5	9	7	3	3	20	15
Non-synonymous of which:	NA	NA	NA	NA	9	7	10	11	8	9	27	27
Not radical	NA	NA	NA	NA	7	3	5	8	2	3	14	14
Radical	NA	NA	NA	NA	2	4	5	3	6	6	13	13

LTRs are the long terminal repeats, sequence length is from the KoRV reference sequence AF151794. Private polymorphisms were those detected in one koala, shared polymorphisms in more than one koala; NA is not applicable. Radical changes are atypical amino acid substitutions with negative scores in both BLOSUM62 and BLOSUM90 matrices. Radical mutations in env (boldface) were more common (p = 0.040) than in gag-pol, relative to other amino acid changes.