Phenylalanine

Photograph of Phenylalanine under the microscope.

Phenylalanine is an essential amino acid that is also one of the aromatic amino acids that exhibit ultraviolet radiation absorption properties with a large extinction coefficient. This characteristic is often used as an analytical tool to quantify the amount of protein in a sample. Phenylalanine plays a key role in the biosynthesis of other amino acids and some neurotransmitters. It is the most commonly found aromatic amino acid in proteins and enzymes with a molar ratio of 3.5 percent compared to the other amino acids, about double the amount of any other aromatic amino acid.

© 1995-2013 by Michael W. Davidson and The Florida State University. All Rights Reserved. No images, graphics, software, scripts, or applets may be reproduced or used in any manner without permission from the copyright holders. Use of this website means you agree to all of the Legal Terms and Conditions set forth by the owners.
This website is maintained by our
Graphics & Web Programming Team
in collaboration with Optical Microscopy at the
National High Magnetic Field Laboratory.
Last modification: Thursday, Mar 04, 2004 at 02:02 PM
Access Count Since April 11, 1998: 127943