Abstract
Evidence is provided that enzymes absorb to cellular structures in a wide range of tissues. In particular, the interactions between glycolytic enzymes and the microfilaments of the cytoplasm are described. The relevance of these interactions to the compartmentation of carbohydrate metabolism is discussed. Examples are given of the variations in degree of binding during alteration of tissue metabolism and, for individual glycolytic enzymes, during fetal development and differentiation. Overall, these data support the concept that metabolic activities in the cytoplasm have an organized structure. Just as the structural elements of the cytosolic compartment have evolved with the capacity to assemble and disassemble in response to the changing requirements of the organism, so the metabolic elements appear to have evolved a parallel system that provides for the appropriate positioning of an energy-producing sequence in relation to the specific, dynamic requirements of the cytoskeleton.
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Selected References
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