Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Eilat to ERA

Enzyme

reactions coenzymes chemical life

Enzyme, any of the more than 1,000 proteins that act as catalysts in chemical reactions in life processes. Generally, enzymes speed up chemical reactions in cells that otherwise would occur too slowly to sustain life. The enzyme itself is not changed by the reaction that it stimulates. Some enzymes cannot function without accessory substances, called coenzymes, which are supplied by food. Many minerals and vitamins act as coenzymes, which is why their absence in a diet may be harmful.

See also: Protein.

EPA [next] [back] Environmental Protection Agency

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or