Journal ArticleDOI
Coupling between simultaneous movements of carrier substrates
TLDR
Countertransport and competitive acceleration were studied experimentally in the glucose system of the red cell membrane and theoretically by analysis of kinetics and the cross-coefficients are found to be equal in accordance with Onsager's law.Abstract:
Countertransport and competitive acceleration were studied experimentally in the glucose system of the red cell membrane and theoretically by analysis of kinetics. It is shown that, although the conditions for demonstration of the two phenomena differ, they are related by a symmetric interdependence of the simultaneous movements of two substrates. The symmetry can be shown by different types of kinetic treatment. Using the phenomenological equations of nonequilibrium thermodynamics for the description, the cross-coefficients are found to be equal in accordance with Onsager's law.read more
Citations
More filters
Book ChapterDOI
The Asymmetry of the Hexose Transfer System in the Human Red Cell Membrane
TL;DR: This chapter reviews some of the several ways in which the hexose transfer system has presented itself; and traces their developments and considers the implications to the concepts of facilitated transfers generally.
Book ChapterDOI
The Present State of the Carrier Hypothesis
TL;DR: The status of the “true carrier” concept as the basis of operation of any natural system for biological transport is discussed, and a number of disaccharides are evidently brought into various yeast cells in the form of their hexose components, by a sequence of events.
Book ChapterDOI
Methods for Studying Transport in Bacteria
TL;DR: The techniques described are discussed in detail with respect to the study of the lactose transport system of Escherichia coli, and it now appears that this transport system can serve as a useful model for a number of active transport systems in both bacterial and animal cells.
Journal ArticleDOI
Trois classes de systèmes de transport chez les bactéries
TL;DR: In this article, it is suggested that the energy coupling step makes the substrate site of the carrier unavailable for exit, so that the final result is a unidirectional active transport.
Journal ArticleDOI
Electrogenic symport of glucose and protons in membrane vesicles of Phanerochaete chrysosporium.
TL;DR: The white rot fungus, Phanerochaete chrysosporium, is one of the few organisms with documented ability to degrade lignin, and membrane vesicles exhibit active glucose transport that is consistent with a glucose/H+ symport mechanism.
References
More filters
Journal Article
The concept of carrier transport and its corollaries in pharmacology
Journal ArticleDOI
Inability of diffusion to account for placental glucose transfer in the sheep and consideration of the kinetics of a possible carrier transfer.
Na+ -dependent transport in the intestine and other animal tissues.
TL;DR: The concept of the brush border membrane of the epithelial cell as a digestive-absorptive surface in which the elements responsible for digestion and absorption are arranged in ordered proximity to one another as in a mosaic is supported by evidence and experiments from the literature.
Journal ArticleDOI
Uphill transport induced by counterflow
Thomas Rosenberg,W. Wilbrandt +1 more
TL;DR: It is shown that the flow-induced uphill transport is a feature characteristic for mobile carrier systems only and is not to be expected in systems in which the substrate is bound to a fixed membrane component ("adsorption membrane"), although such a system may yield identical transport kinetics.
Related Papers (5)
The Role of Energy Coupling in the Transport of β-Galactosides by Escherichia coli
Hans Winkler,T H Wilson +1 more