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From Longman Dictionary of Contemporary English
Related topics: Nutrition, Biology
proteinpro‧tein /ˈprəʊtiːn $ ˈproʊ-/ ●●○ noun [countable, uncountable]  DFNone of several natural substances that exist in food such as meat, eggs, and beans, and which your body needs in order to grow and remain strong and healthy
Examples from the Corpus
proteinThe molecular identity of the 240K protein is not yet known.The second interferon-induced enzyme adds a phosphate group to a protein that is essential for the synthesis of new proteins to begin.It can only obtain it by eating animal proteins.Understanding the Role of Antibodies Antibodies are protein substances manufactured by the human immune system to help defend us against diseases.Although guayule latex contains fewer proteins than hevea, manufacturers should still wash it well, Cornish said.Renewing the airstone Q. Adjusting my protein skimmer is causing me problems.Kidneys clog with protein from damaged muscles, damming up toxins in the blood.
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