Vertebrates without Erythrocytes and Blood Pigment

@article{Ruud1954VertebratesWE,
  title={Vertebrates without Erythrocytes and Blood Pigment},
  author={J. T. Ruud},
  journal={Nature},
  year={1954},
  volume={173},
  pages={848-850}
}
A genomic fossil reveals key steps in hemoglobin loss by the antarctic icefishes.
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