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protein
[proh-teen, -tee-in]
noun
Biochemistry., any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the diet of all animals and other nonphotosynthesizing organisms, composed of 20 or more amino acids linked in a genetically controlled linear sequence into one or more long polypeptide chains, the final shape and other properties of each protein being determined by the side chains of the amino acids and their chemical attachments: proteins include such specialized forms as collagen for supportive tissue, hemoglobin for transport, antibodies for immune defense, and enzymes for metabolism.
the plant or animal tissue rich in such molecules, considered as a food source supplying essential amino acids to the body.
(formerly) a substance thought to be the essential nitrogenous component of all organic bodies.
adjective
Biochemistry., of the nature of or containing protein.
protein
/ ˈprəʊtiːn /
noun
any of a large group of nitrogenous compounds of high molecular weight that are essential constituents of all living organisms. They consist of one or more chains of amino acids linked by peptide bonds and are folded into a specific three-dimensional shape maintained by further chemical bonding
protein
Any of a large class of complex organic chemical compounds that are essential for life. Proteins play a central role in biological processes and form the basis of living tissues. They consist of long chains of amino acids connected by peptide bonds and have distinct and varied three-dimensional structures, usually containing alpha helices and beta sheets as well as looping and folded chains. Enzymes, antibodies, and hemoglobin are examples of proteins.
Other Word Forms
- proteinaceous adjective
- proteinic adjective
- proteinous adjective
- nonprotein noun
Word History and Origins
Origin of protein1
Word History and Origins
Origin of protein1
A Closer Look
Example Sentences
Different lipid-lowering mechanisms The study also found that each drug works by different mechanisms and describes, for the first time, the key role of the PCK1 protein in telmisartan-derived hepatic lipid lowering.
This protein punctures the membrane of target cells, leading to their death.
Their new study, published in Cancer Research, shows that a protein strongly associated with Alzheimer’s disease can also enhance the immune system’s strength.
Researchers at MIT have now discovered a way to significantly reduce these errors by altering the key proteins that drive the editing process.
The focus of this research was on a particular protein that is involved in that system of damage sensing and repair.
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