Table 2. d N/d S ratios of the env gene on internal branches of trees from representative HERV families
Class Family No. of elements dN/dSP value*
I HERV-E 26 0.22 <0.001
HERV-H 60 0.24 <0.001
HERV-T 12 0.12 <0.001
HERV-R 9 0.45 0.05-0.1
II HERV-HML3 91 0.73 <0.05
HERV-HML5 30 0.40 <0.001
HERV-HML6 15 0.35 <0.001
III HERV-S 34 0.21 <0.001
  • The significance of the difference in likelihood if this ratio is fixed at 1 is shown.

  • * Taken from critical values on the χ2 distribution.

  • Only for HERV-H elements that have an intact env.

  • Excluding elements copied by segmental duplication; this family is also termed HERV-S71.