Possible adaptive significance of low red cell organic phosphates in crocodiles

1979 ◽  
Vol 209 (1) ◽  
pp. 161-167 ◽  
Author(s):  
Gordon C. Grigg ◽  
Margie Gruca
Keyword(s):  
Adaptive Significance ◽  
Red Cell ◽  
Organic Phosphates ◽  
Red Cell Organic Phosphates

THE SHIFT TO THE LEFT

PEDIATRICS ◽  
1971 ◽  
Vol 48 (6) ◽  
pp. 853-856 ◽  
Author(s):  
Frank A. Oski ◽  
Maria Delivoria-Papadopoulos
Keyword(s):  
Oxygen Transport ◽  
Normal Adult ◽  
Red Cell ◽  
Equilibrium Curve ◽  
Organic Phosphates ◽  
Clinical Interest ◽  
Red Cell Organic Phosphates

For many years it appeared that physiologists, and physiologists alone, puzzled over the causes and significance of alterations in the position of the oxygen-hemoglobin equilibrium curve. The reports by Benesch and Benesch1 and Chanutin and Curnish2 in 1967, concerning the role of red cell organic phosphates in determining the affinity of hemoglobin for oxygen, have served to rekindle curiosity in this problem of oxygen transport and produced a common focus of clinical interest for neonatologists, hematologists, biochemists, and the now nearly forgotten physiologists. The oxygen-hemoglobin equilibrium curve of normal adult blood is depicted as the center curve in Figure 1.

The Effect of Anti A Antibody on Red Cell Organic Phosphates and Adenosine Triphosphatase Activity in vitro

2009 ◽  
Vol 5 (3) ◽  
pp. 191-210 ◽  
Author(s):  
Jiří Palek ◽  
Libuše Mirčevová ◽  
Václav Brabec ◽  
Brfzřich Friedmann ◽  
Alexej Májský
Keyword(s):  
Adenosine Triphosphatase ◽  
Red Cell ◽  
Adenosine Triphosphatase Activity ◽  
Organic Phosphates ◽  
Red Cell Organic Phosphates

Adaptive significance of red cell potassium types in buffaloes

1974 ◽  
Vol 82 (3) ◽  
pp. 563-566 ◽  
Author(s):  
B. P. Sengupta
Keyword(s):  
Thermal Stress ◽  
Rectal Temperature ◽  
Dry Matter ◽  
Haemoglobin Concentration ◽  
Cell Types ◽  
Arid Environment ◽  
Adaptive Significance ◽  
Red Cell ◽  
Adaptive Potential ◽  
Haematological Indices

SUMMARYThe possible adaptive significance of the occurrence of HK and LK red-cell types in Murrah buffaloes was investigated. Judged by haematological indices and thermorespiratory responses under conditions of moderate thermal stress, LK animals appeared to have a greater adaptive potential than HK animals in a hot arid environment. Dry matter percentage, packed cell volume (pcv), haemoglobin concentration (Hb), red blood corpuscles (RBC) and plasma protein values were significantly higher in LK-type animals. In addition, under identical conditions of thermal stress the LK animals exhibited significantly less rise in rectal temperature and respiratory rate than the HK animals.

scholarly journals Organic phosphates increase the solubility of avian haemoglobin D and embryonic chicken haemoglobin

1984 ◽  
Vol 217 (3) ◽  
pp. 767-771 ◽  
Author(s):  
R Baumann ◽  
E Goldbach ◽  
E A Haller ◽  
P G Wright
Keyword(s):  
Ionic Strength ◽  
Stoichiometric Ratio ◽  
Red Cell ◽  
Physiological Temperature ◽  
Organic Phosphates ◽  
Functional Homology ◽  
Embryonic Chicken ◽  
Crystalline Aggregates

The isolated minor haemoglobin fractions (haemoglobin D) of ostrich, chicken and duck haemoglobin, which constitute about 30% of total intracellular haemoglobin, form crystalline aggregates upon deoxygenation at physiological temperature, ionic strength and pH and at haemoglobin concentrations even well below those present in the red cell. The aggregation is reversed by oxygenation, and can be inhibited by addition of organic phosphates or the corresponding major haemoglobin fraction in a stoichiometric ratio of 1:1. Embryonic haemoglobin from chicken has similar characteristics with respect to its solubility. The results indicate close functional homology of alpha D and embryonic pi-chains as well as a novel role for organic phosphates in the regulation of haemoglobin function.

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