protein

pro·tein

These are all good sources of protein.

noun

The definition of a protein is a substance that has amino acids, compounds and carbon, hydrogen, oxygen, nitrogen and sometimes sulfur and is found in many foods.

An example of a protein is the type of nutrient found in meats.

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"protein." YourDictionary, n.d. Web. 19 June 2019. <https://www.yourdictionary.com/PROTEIN>.

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protein

any of a large class of complex polymers consisting of long chains of polypeptides often bonded with nucleic acids, lipids, etc.: proteins are found in all cells, are essential to the diet of animals, are the basic components of cartilage, hair, skin, etc., and often function as enzymes, hormones, or antibodies

Origin of protein

German from French protéine from Classical Greek pr?teios, prime, chief from pr?tos, first (see proto-): from being a chief constituent of plant and animal bodies

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"protein." YourDictionary, n.d. Web. 19 June 2019. <https://www.yourdictionary.com/PROTEIN>.

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protein. (n.d.). Retrieved June 19th, 2019, from https://www.yourdictionary.com/PROTEIN

protein

noun

Any of a group of complex organic macromolecules that contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur and are composed of one or more chains of amino acids. Proteins are fundamental components of all living cells and include many substances, such as enzymes, hormones, and antibodies, that are necessary for the proper functioning of an organism. They are essential in the diet of animals for the growth and repair of tissue and can be obtained from foods such as meat, fish, eggs, milk, and legumes.

Origin of protein

French protéine from Late Greek prōteios of the first quality from Greek prōtos first ; see per¹ in Indo-European roots.

Related Forms:

pro′tein·a′ceous pro·tein′ic pro·tein′ous
adjective

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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"protein." YourDictionary, n.d. Web. 19 June 2019. <https://www.yourdictionary.com/PROTEIN>.

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protein. (n.d.). Retrieved June 19th, 2019, from https://www.yourdictionary.com/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.

A Closer Look Proteins are the true workhorses of the body, carrying out most of the chemical processes and making up the majority of cellular structures. Proteins are made up of long chains of amino acids, but they don't resemble linear pieces of spaghetti. The atoms in these long chains have their own attractive and repulsive properties. Some of the amino acids can form bonds with other molecules in the chain, kinking and twisting and folding into complicated, three-dimensional shapes, such as helixes or densely furrowed globular structures. These folded shapes are immensely important because they define the protein's function in the cell. Some protein shapes fit perfectly in cell receptors, turning chemical processes on and off, like a key in a lock, whereas others work to transport molecules throughout the body (hemoglobin's shape is ideal for carrying oxygen). When proteins fail to take on their preordained shapes, there can be serious consequences: misfolded proteins have been implicated in diseases such as Alzheimer's, mad cow, and Parkinson's, among others. Exactly how proteins are able to fold into their required shapes is poorly understood and remains a fundamental question in biochemistry. See more at prion

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"protein." YourDictionary, n.d. Web. 19 June 2019. <https://www.yourdictionary.com/PROTEIN>.

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protein. (n.d.). Retrieved June 19th, 2019, from https://www.yourdictionary.com/PROTEIN

Noun

(countable and uncountable, plural proteins)

(biochemistry) Any of numerous large, complex naturally-produced molecules composed of one or more long chains of amino acids, in which the amino acid groups are held together by peptide bonds.
(nutrition) One of three major classes of food or source of food energy (4 kcal/gram) abundant in animal-derived foods (ie: meat) and some vegetables, such as legumes. see carbohydrate and fat for the other two major classes
For each dish, select a curry, protein, and spiciness.

Origin

Suggested by Berzelius in a letter to Mulder, from French protÃ©ine and German Protein, both coined based on Ancient Greek Ï€ÏÏ‰Ï„Îµá¿–Î¿Ï‚ (prÅteios, “primary"), from Ï€Ïá¿¶Ï„Î¿Ï‚ (prÅtos, “first").

English Wiktionary. Available under CC-BY-SA license.

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protein - Medical Definition

n.

Any of a group of complex organic macromolecules that contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur and are composed of one or more chains of amino acids. Proteins are fundamental components of all living cells and include many substances, such as enzymes, hormones, and antibodies, that are necessary for the proper functioning of an organism. They are essential in the diet of animals for the growth and repair of tissue and can be obtained from foods such as meat, fish, eggs, milk, and legumes.
1. A food that is composed of such macromolecules: What protein would you like for dinner: chicken or fish?
2. The portion of a food consisting of such macromolecules: Nuts contain significant quantities of protein.

Related Forms: