a substance made or used when the body breaks down food, drugs or chemicals, or its own tissue (for example, fat or muscle tissue). this process, called metabolism, makes energy and the materials needed for growth, reproduction, and maintaining health. it also helps get rid of toxic substances.
出典:Wikipedia
出典:『Wikipedia』 (2011/07/31 16:41 UTC 版)
Metabolites are the intermediates and products of metabolism. The term metabolite is usually restricted to small molecules. A primary metabolite is directly involved in normal growth, development, and reproduction. Alcohol is an example of a primary metabolite produced in large-scale by industrial microbiology. A secondary metabolite is not directly involved in those processes, but usually has an important ecological function. Examples include antibiotics and pigments. Some antibiotics use primary metabolites as precursors, such as actinomycin which is created from the primary metabolite, tryptophan.
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