Arctic adaptation in reindeer The energy saving of a hemoglobin

Previous results [(1988) Arct. Med. Res. 47, 83–88] have shown that hemoglobin from reindeer is characterized by a low overall heat of oxygenation. This particular aspect has been investigated further in a series of precise oxygen equilibrium experiments. The results obtained show a peculiar depende...

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Bibliographic Details
Published in:FEBS letters 1989-04, Vol.247 (1), p.135-138
Main Authors: Giardina, Bruno, Brix, Ole, Nuutinen, Matti, El Sherbini, Said, Bardgard, Astrid, Lazzarino, Giuseppe, Condò, Saverio G.
Format: Article
Language:English
Subjects:
2,3-Diphosphoglycerate
Adaptation, Physiological
Animals
Chlorides - blood
cold
Cold adaptation
Cold Temperature
Diphosphoglyceric Acids - blood
Energy Metabolism
Hemoglobin
Hemoglobins - metabolism
Humans
Hydrogen-Ion Concentration
oxygen
Oxygen - blood
Oxygen binding
Protein Conformation
Reindeer
Reindeer - physiology
Temperature
Thermodynamics
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Summary:Previous results [(1988) Arct. Med. Res. 47, 83–88] have shown that hemoglobin from reindeer is characterized by a low overall heat of oxygenation. This particular aspect has been investigated further in a series of precise oxygen equilibrium experiments. The results obtained show a peculiar dependence of the temperature effect on the fractional saturation of hemoglobin with oxygen, which could be regarded as a very interesting case of molecular adaptation to extreme environmental conditions.
ISSN:0014-5793
1873-3468
DOI:10.1016/0014-5793(89)81256-6