Hsp-90 and the biology of nematodes

Table 5 Branch-site analysis of hsp-90 sequences grouped according to GA-binding status

	Number of branches			Parameter estimates under free model			d_N/d_S
Clade	All	foreground	LRT statistic	p0^a	p1^b	p2^c	background	foreground	Sites under positive selection
GA binders	27	7	0.00	0.984	0.012	0.004	0.014	1.00	n/a
GA non-binders	27	20	0.00	0.978	0.004	0.18	0.014	1.00	n/a

n/a not available. Number of branches: count of branches partitioned as foreground. LRT statistic: 2 times log likelihood difference of fixed versus free nested models.
^a Proportion of sites in category p0 where selection is purifying throughout the tree (0 < ω₀ < 1).
^b Proportion of sites in category p1 where selection is neutral throughout the tree (ω₁ = 1).
^c Proportion of sites in category p2 where selection is positive in foreground branches; sum of category 2a: purifying selection in background but positive selection in foreground (0 < ω₀ < 1, ω₂ > 1); and category 2b: neutral selection in background but positive selection in foreground (ω₁ = 1, ω₂ > 1

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