Photograph of Lysine under the microscope.

Lysine is an essential amino acid that has a net positive charge at physiological pH values making it one of the three basic (with respect to charge) amino acids. This polar amino acid is commonly found on the surfaces of proteins and enzymes, and sometimes appears in the active site. Sources of lysine include meats, fish, poultry, and dairy products. Lysine is incorporated into proteins at the rate of 7 percent on a molar basis compared to the other amino acids.

© 1995-2015 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 01:02 PM
Access Count Since April 11, 1998: 71521