Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin
1. The oxygen binding properties of the hemoglobin from the Lesser Rorqual, Balaenoptera acutorostrata, has been investigated with respect to the possible effects of organic phosphates on gas transport in arctic environments. 2. The intrinsic oxygen affinity of the hemoglobin is high and strongly mo...
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Language: | English |
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1989
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Online Access: | http://hdl.handle.net/2108/54802 |
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ftunivromatorver:oai:art.torvergata.it:2108/54802 2024-06-09T07:43:49+00:00 Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin Brix, O Lazzarino, G Clementi, M Scatena, R Giardina, B. CONDO', SAVERIO GIOVANNI Brix, O Condo', Sg Lazzarino, G Clementi, M Scatena, R Giardina, B 1989 http://hdl.handle.net/2108/54802 eng eng volume:94 issue:1 firstpage:139 lastpage:142 journal:COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY http://hdl.handle.net/2108/54802 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0024795369 Oxygen Animal Organophosphorus Compound Thermodynamic Hemoglobin Hydrogen-Ion Concentration Temperature Adaptation Physiological Cetacea Whale Blood Protein Electrophoresis Settore BIO/10 - BIOCHIMICA info:eu-repo/semantics/article 1989 ftunivromatorver 2024-05-14T23:37:46Z 1. The oxygen binding properties of the hemoglobin from the Lesser Rorqual, Balaenoptera acutorostrata, has been investigated with respect to the possible effects of organic phosphates on gas transport in arctic environments. 2. The intrinsic oxygen affinity of the hemoglobin is high and strongly modulated by the effects of organic phosphates. 3. In the absence of organic phosphates, the temperature sensitivity of oxygen binding expressed by the heat of oxygenation, delta H, is -16.2 kcal/mol when corrected for the heat of oxygen in solution. 4. In the presence of organic phosphates there is a marked decrease in the temperature sensitivity delta H approximately -5 kcal/mol). 5. This feature is of great importance for oxygen unloading in the flippers and the tail, where the temperature is lower than the trunk of the whale. 6. Furthermore the organic phosphates strongly increase the Bohr coefficient, delta log P50/delta pH, from less than -0.3 in stripped hemoglobin to about -1.5 when the hemoglobin is saturated with P6-inositol. 7. This feature may be of great physiological importance by reducing the CO2 tension and acidosis after a prolonged dive. Article in Journal/Newspaper Arctic Balaenoptera acutorostrata Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca Arctic Rorqual ENVELOPE(-62.311,-62.311,-65.648,-65.648) |
institution |
Open Polar |
collection |
Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca |
op_collection_id |
ftunivromatorver |
language |
English |
topic |
Oxygen Animal Organophosphorus Compound Thermodynamic Hemoglobin Hydrogen-Ion Concentration Temperature Adaptation Physiological Cetacea Whale Blood Protein Electrophoresis Settore BIO/10 - BIOCHIMICA |
spellingShingle |
Oxygen Animal Organophosphorus Compound Thermodynamic Hemoglobin Hydrogen-Ion Concentration Temperature Adaptation Physiological Cetacea Whale Blood Protein Electrophoresis Settore BIO/10 - BIOCHIMICA Brix, O Lazzarino, G Clementi, M Scatena, R Giardina, B. CONDO', SAVERIO GIOVANNI Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
topic_facet |
Oxygen Animal Organophosphorus Compound Thermodynamic Hemoglobin Hydrogen-Ion Concentration Temperature Adaptation Physiological Cetacea Whale Blood Protein Electrophoresis Settore BIO/10 - BIOCHIMICA |
description |
1. The oxygen binding properties of the hemoglobin from the Lesser Rorqual, Balaenoptera acutorostrata, has been investigated with respect to the possible effects of organic phosphates on gas transport in arctic environments. 2. The intrinsic oxygen affinity of the hemoglobin is high and strongly modulated by the effects of organic phosphates. 3. In the absence of organic phosphates, the temperature sensitivity of oxygen binding expressed by the heat of oxygenation, delta H, is -16.2 kcal/mol when corrected for the heat of oxygen in solution. 4. In the presence of organic phosphates there is a marked decrease in the temperature sensitivity delta H approximately -5 kcal/mol). 5. This feature is of great importance for oxygen unloading in the flippers and the tail, where the temperature is lower than the trunk of the whale. 6. Furthermore the organic phosphates strongly increase the Bohr coefficient, delta log P50/delta pH, from less than -0.3 in stripped hemoglobin to about -1.5 when the hemoglobin is saturated with P6-inositol. 7. This feature may be of great physiological importance by reducing the CO2 tension and acidosis after a prolonged dive. |
author2 |
Brix, O Condo', Sg Lazzarino, G Clementi, M Scatena, R Giardina, B |
format |
Article in Journal/Newspaper |
author |
Brix, O Lazzarino, G Clementi, M Scatena, R Giardina, B. CONDO', SAVERIO GIOVANNI |
author_facet |
Brix, O Lazzarino, G Clementi, M Scatena, R Giardina, B. CONDO', SAVERIO GIOVANNI |
author_sort |
Brix, O |
title |
Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
title_short |
Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
title_full |
Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
title_fullStr |
Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
title_full_unstemmed |
Arctic life adaptation--III. The function of whale (Balaenoptera acutorostrata) hemoglobin |
title_sort |
arctic life adaptation--iii. the function of whale (balaenoptera acutorostrata) hemoglobin |
publishDate |
1989 |
url |
http://hdl.handle.net/2108/54802 |
long_lat |
ENVELOPE(-62.311,-62.311,-65.648,-65.648) |
geographic |
Arctic Rorqual |
geographic_facet |
Arctic Rorqual |
genre |
Arctic Balaenoptera acutorostrata |
genre_facet |
Arctic Balaenoptera acutorostrata |
op_relation |
volume:94 issue:1 firstpage:139 lastpage:142 journal:COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY http://hdl.handle.net/2108/54802 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0024795369 |
_version_ |
1801372672527958016 |