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Proline
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A metabolic pathway diagram for Escherichia coli showing how various nutrients-including sugars, fats, glycerol, and amino acids-are broken down into intermediates like pyruvate and acetyl-CoA, leading to the production of energy and other metabolites such as lactate, glutamate, and succinate. Arrows indicate the flow of metabolites between compounds, with key nutrient sources and products highlighted in colored boxes.
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Proline

chemical compound
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Proline, an amino acid obtained by hydrolysis of proteins. Its molecule contains a secondary amino group (>NH) rather than the primary amino group (>NH2) characteristic of most amino acids. Unlike other amino acids, proline, first isolated from casein (1901), is readily soluble in alcohol. Collagen, the principal protein of connective tissue, yields about 15 percent proline. It is one of several so-called nonessential amino acids; i.e., animals can synthesize it from glutamic acid and do not require dietary sources. The chemical structure of proline isproline, chemical compound

This article was most recently revised and updated by Erik Gregersen.