Degeneration patterns of the olfactory receptor genes in sea snakes.

  title={Degeneration patterns of the olfactory receptor genes in sea snakes.},
  author={Takushi Kishida and Tsutomu Hikida},
  journal={Journal of evolutionary biology},
  volume={23 2},
The sense of smell relies on the diversity of olfactory receptor (OR) repertoires in vertebrates. It has been hypothesized that different types of ORs are required in terrestrial and marine environments. Here we show that viviparous sea snakes, which do not rely on a terrestrial environment, have significantly lost ORs compared with their terrestrial relatives, supporting the hypothesis. On the other hand, oviparous sea snakes, which rely on a terrestrial environment for laying eggs, still… CONTINUE READING
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