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Table 5 Results of SCA co-evolutionary analyses for each selective site. The t and corresponding P-values are given for the SCA scores (s), distances between sites (d), and the ratios of these measures (s/d)

From: Evolutionary analysis of mitochondrially encoded proteins of toad-headed lizards, Phrynocephalus, along an altitudinal gradient

  Selective sites n s d s/d
Gene t P t P t P
ND2 10 346 0.430 0.670 −2.065 0.045* 1.140 0.255
ND3 9 91 0.774 0.513 0.171 0.877 1.058 0.293
ND4 109 421 1.344 0.192 −0.554 0.584 0.137 0.891
ND4 187 421 0.285 0.778 1.042 0.305 0.973 0.331
ND4 448 421 1.422 0.168 −1.618 0.118 1.851 0.062
ND4 454 421 −1.743 0.093 −0.949 0.351 −1.967 0.049*
ND5 365 537 1.004 0.333 −4.434 < 0.001* −0.015 0.988
ND6 100 97 −0.552 0.598 −2.795 0.027* 0.715 0.496
ND6 137 97 1.715 0.128 −0.341 0.743 1.488 0.143
  1. *P < 0.05