The primary structures of alpha- and beta-chains of hemoglobin from reindeer (Rangifer tarandus tarandus) were determined. Comparison of the reindeer hemoglobin sequence with those of human and bovine hemoglobins showed 50 and 29 substitutions per alpha beta dimer, respectively. The influence of replacements on the modulation of hemoglobin oxygen affinity by heterothopic ligands and temperature, as well as their importance on the structure-function relationships in hemoglobin are discussed.
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http://dx.doi.org/10.1016/0167-4838(91)90270-a | DOI Listing |
Biochem J
June 2004
Institute of Biochemistry and Clinical Biochemistry and CNR Institute of Chemistry of Molecular Recognition, Catholic University of Rome, L.go F. Vito 1, 00168 Rome, Italy.
Haemoglobins from mammals of sub-Arctic and Arctic species, as well as fetal human Hb, are all characterized by a significantly lower Delta H of oxygenation compared with the majority of mammalian haemoglobins from temperate species (exceptions are represented by some cold-resistant species, such as cow, horse and pig). This has been interpreted as an adaptive mechanism of great importance from a physiological point of view. To date, the molecular basis of this thermodynamic characteristic is still not known.
View Article and Find Full Text PDFThe blood serum of the reindeer does not virtually contain any antibodies to respiratory and intestinal viruses widely spread among the cattle. The reindeer blood serum is comparable with the bovine serum by the contents of chlorides, hemoglobin, total protein and protein fractions; however, it is different from the latter by a 2.5-fold higher content of glucose and by a higher osmotic pressure.
View Article and Find Full Text PDFAm J Vet Res
March 2001
Department of Arctic Veterinary Medicine, Norwegian School of Veterinary Science, Tromsø.
Objective: To evaluate clinical effects and repeatability of clinical effects for an optimal immobilizing dose of a combination of medetomidine hydrochloride (MED) and ketamine hydrochloride (KET) in reindeer (Rangifer tarandus tarandus).
Animals: 12 healthy 6- to 8-month old reindeer.
Procedure: Each reindeer was immobilized once with an initial dose (combination of 0.
Biophys Chem
March 1996
Department of Biology, Johns Hopkins University, Baltimore, MD 21218, USA.
High-precision thin-layer gas-solution microcalorimetry has been used to study the oxygen binding properties of fallow-deer (Dama dama) hemoglobin under physiological conditions. This method measures directly the enthalpy of macromolecular ligand binding by changing the ligand activity in a manner analogous to that of the Gill thin-layer optical apparatus ([1], D. Dolman and S.
View Article and Find Full Text PDFAm J Physiol
November 1994
Department of Biochemistry, College of Veterinary Medicine, Helsinki, Finland.
The responses to near-maximal exercise before and after the training and racing season were examined in reindeer. The reindeer were tested when pulling a driver at a speed of 11-12 m/s for 600 m. The lactate responses were higher before than after training.
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