Nonvertebrate hemoglobins: functions and molecular adaptations.

@article{Weber2001NonvertebrateHF,
  title={Nonvertebrate hemoglobins: functions and molecular adaptations.},
  author={Roy E. Weber and Serge N. Vinogradov},
  journal={Physiological reviews},
  year={2001},
  volume={81 2},
  pages={
          569-628
        }
}
Hemoglobin (Hb) occurs in all the kingdoms of living organisms. Its distribution is episodic among the nonvertebrate groups in contrast to vertebrates. Nonvertebrate Hbs range from single-chain globins found in bacteria, algae, protozoa, and plants to large, multisubunit, multidomain Hbs found in nematodes, molluscs and crustaceans, and the giant annelid and vestimentiferan Hbs comprised of globin and nonglobin subunits. Chimeric hemoglobins have been found recently in bacteria and fungi. Hb… 

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