Proteins - Research Article from Macmillan Science Library: Genetics

This encyclopedia article consists of approximately 9 pages of information about Proteins.
This section contains 2,697 words
(approx. 9 pages at 300 words per page)
Buy the Proteins Encyclopedia Article

Properties of Amino Acids

The English language consists of thousands of words, created from any of twenty-six letters arranged in a precise order. In an analogous fashion, proteins are made up of twenty common amino acids in a precise order dictating the protein's structure and function. Every amino acid has a common structure, in which a central carbon is covalently bonded to a carboxyl group (COOH), an amino group (NH2), a hydrogen, and a variable "R" group.

Amino acid structure. Adapted from Robinson, 2001. Amino acid structure. Adapted from Robinson, 2001.

The chemical properties of the R group are what give an amino acid its character. The R group can be hydrophilic (attracted to water and other polar molecules) or hydrophobic (attracted to nonpolar molecules and repelled by water or other polar molecules). Hydrophilic R groups can have basic charges, as in the amino acid valine, or acidic, as in glutamic acid, or they may even be...

(read more)

This section contains 2,697 words
(approx. 9 pages at 300 words per page)
Buy the Proteins Encyclopedia Article
Copyrights
Macmillan Science Library: Genetics
Proteins from Macmillan Science Library: Genetics. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.
Follow Us on Facebook