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Volume 95, Issue 1 p. 1-20
The Ninth Sir Hans Krebs Lecture
Free Access

Compartmentation and Communication in Living Systems. Ligand Conduction: a General Catalytic Principle in Chemical, Osmotic and Chemiosmotic Reaction Systems

Peter MITCHELL

Peter MITCHELL

Glynn Research Institute, Glynn House, Bodmin, Cornwall, Great Britain, PL30 4AU

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First published: March 1979
Citations: 300

Abstract

Chemical reactions, like osmotic reactions, are transport processes when looked at in detail. Chemical catalysis by enzymes or catalytic carriers, and osmotic catalysis by porters, may be conceived as occurring by specific ligand-conduction mechanisms. In chemiosmotic reaction systems, the pathways of specific ligand conduction are spatially orientated through anisotropic enzyme and catalytic carrier complexes in which the reactions of chemical group transfer occur as vectorial diffusion processes of group translocation down gradients of group potential that represent real spatially-directed fields of chemical force. Thus, it is easier to explain biochemistry in terms of transport than it is to explain transport in terms of biochemistry.