proteins

Cultural  

1. Complex organic molecules (see also organic molecule) made up of amino acids. Proteins are basic components of all living cells and are therefore among the principal substances that make up the body. In addition to being necessary for the growth and repair of the body's tissues, proteins provide energy and act as enzymes that control chemical reactions in the cell.

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Foods that contain a high percentage of protein include meat, fish, poultry, milk products, beans, and nuts.

Example Sentences

A membrane forms around unwanted material, and recognition proteins help guide enzymes that break down old or damaged components.

From Science Daily • May 27, 2026

Instead of targeting cholesterol after it has already been produced, HELZ2 influences the process at the genetic instruction stage before the proteins are even made.

From Science Daily • May 25, 2026

While leucine is already known for its role in building proteins, the new research uncovered another important function.

From Science Daily • May 21, 2026

By protecting those proteins from being degraded, leucine allows mitochondria to work at a higher level and helps cells meet increased energy demands.

From Science Daily • May 21, 2026

Rumor had it that Pauling had now turned his attention from proteins to the structure of DNA.

From "The Gene" by Siddhartha Mukherjee