منابع مشابه
Glucose transport in human red blood cells
The penetration of D-[C] glucose into human red blood cells (RBCs) features kinetic parameters which are readily distinguishable from passive permeation. It would be expected to require activation energy above 80 kJ/mol for permeation of glucose with five hydroxyls capable of forming hydrogen bonds, but the measured activation energy is approximately 16 kJ/mol. As a consequence, glucose permeat...
متن کاملOn uridine transport in human red blood cells
Dear Sir: In our work (1) we have made use o f Stein and Lieb's (2) approach to obtain values of ratios o f molecular rate constants related to t ranspor t steps. In o rd e r to rationalize ou r results we assumed at the t ime that in equi l ibr ium-exchange conditions the concent ra t ion o f the carrier-substrate complex was h igher at the external surface of the cell and that the tu rnover r...
متن کاملLithium transport pathways in human red blood cells
In human red cells, Li is extruded against its own concentration gradient if the external medium contains Na as a dominant cation. This uphill net Li extrusion occurs in the presence of external Na but not K, Rb, Cs, choline, Mg, or Ca, is ouabain-insensitive, inhibited by phloretin, and does not require the presence of cellular ATP. Li influx into human red cells has a ouabain-sensitive and a ...
متن کاملCharacteristics of Chloride Transport in Human Red Blood Cells
The efflux of chloride-36 from human erythrocytes under steady-state conditions is a saturable process that is competitively inhibited by bicarbonate and noncompetitively inhibited by acetate. This chloride self-exchange flux is reversibly dependent on the pH of the medium between 5.7 and 9.6 with a maximum flux at pH 7.8. The increase in chloride flux between pH 5.7 and 7.8 is inexplicable by ...
متن کاملLithium Transport Pathways in Human Red Blood Cells
In human red cells, Li is ex t ruded against its own concentrat ion gradient if the external medium contains Na as a dominant cation. This uphill net Li extrusion occurs in the presence of external Na but not K, Rb, Cs, choline, Mg, or Ca, is ouabain-insensitive, inhibited by phloredn , and does not require the presence of cellular ATP. Li influx into human red cells has a ouabain-sensitive and...
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ژورنال
عنوان ژورنال: American Journal of Biomedical and Life Sciences
سال: 2013
ISSN: 2330-8818
DOI: 10.11648/j.ajbls.20130103.12