Description; Application; Protein-AQUA™ is a powerful, enabling technology that facilitates focused, quantitative studies of not only specific protein expression, but specific amino acid modification as well, using stable-isotope–labeled peptides and mass spectrometry.; Legal Information; This method was developed by Dr. Steve Gygi and colleagues at Harvard Medical School. Limited use of this method is permitted under a licensing arrangement with Harvard Medical School.; This product is licensed under U.S. Patent No. 7,396,688 and foreign counterparts from E. I. du Pont de Nemours and Company. The purchase of this product conveys to the buyer the nontransferable right to use the purchased amount of the product for research and development only, including services for a third party for consideration. The buyer cannot sell or otherwise transfer this product, its components or materials made using this product or its components to a third party. Information about licenses for excluded uses is available from: E. I. du Pont de Nemours and Company; Attn: Associate Director, Commercial Development; DuPont Experimental Station E268; 200 Powdermill Rd.; Wilmington, DE 19803; 1-877-881-9787 (voice), 1-302-695-1437 (fax), licensing@dupont.com.; AQUA is a trademark of Harvard Medical School