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Table 1 Positive selection analysis of USP genes for species of class Cestoda

From: Evolutionary fates of universal stress protein paralogs in Platyhelminthes

Model

Estimates of parameters

L

Positive selected sites (PSS)a

M0 (one-ratio)

ω = 0.32480

−17568.832757

None

M1a (neutral)

ω0 = 0.03822, ω1 = 1, p0 = 0.95404, p1 = 0.04596

−16175.637618

Not allowed

M2a (selection)

ω0 = 0.03823, ω1 = 1., ω2 = 1, p0 = 0.95404, p1 = 0.00224, p2 = 0.04372

−16175.637618

151 N b

M7 (beta)

p = 0.04543, q = 0.40703

−16106.206229

Not allowed

M8 (beta & ω)

p0 = 0.97089, p = 0.03908, q = 0.98312, p1 = 0.02911, ω = 1

−16028.140026

7 K 16E 20 T 32 K 45R 48 K 49 K 50R 51D 64 K 65S 671 N 72E 77 L 80E 83 N 114 K 115I 117E 120G 151N

  1. aPositive selected sites (Bayes Empirical Bayes, BEB) are inferred at a cutoff posterior probability P ≥ 95%. Values for P ≥ 99% are shown in bold font. The underlined PSS indicate a value of 3 (range from 1, positive selection, to 7, purifying selection) obtained with SELECTON (see Additional file 1: Table S4). Amino acid sites correspond to the reference sequence MJ0577 from Methanococcus jannaschii
  2. bDespite the presence of positive selected sites (24 sites with P ≥ 50%, 1 site with P ≥ 95%), the LRT test was not significant when comparing the Log likelihood scores from the M1a and M2a models