| Two known enzymes catabolize the essential amino acid tryptophan in mammals. |
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| Chronic, excessive intake of protein elevates the activity of enzymes that catabolize it or convert it to fat. |
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| The human cell contains endosymbiotic archaea with ability to catabolize cholesterol and synthesise digoxin. |
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| Microorganisms which are able to produce L-carnitine from gamma-butyrobetaine or from a mixture of gamma-butyrobetaine and crotonobetaine and which do not catabolize L-carnitine. |
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| During pro-longed recoveries, patients can catabolize up to one-tenth of their muscle mass despite putting on weight. |
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| The bacterium's ability to catabolize biphenyls is directly related to the presence of a locus of approximately thirteen genes known as the bph cluster. |
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| Similarly, humans' ability to catabolize ethanoll via alcohol dehydrogenase and acetaldehyde dehydrogenase lends support to an evolutionary history with alcohol. |
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