Figure 1 - full size

 

Figure 1.
Figure 1. The currently accepted mechanism of asparagine nonenzymatic deamidation.[11][12] The succinimide intermediate formation arises from a nucleophilic attack of the backbone NH group of the next residue on the side-chain carbonyl of the asparaginyl residue. The ring is hydrolyzed to open, resulting in either an aspartic acid or isoaspartic acid product.

The above figure is reprinted by permission from John Wiley & Sons, Inc.: Proteins (2008, 72, 313-322) copyright 2008.