Proline, a simple amino acid that recurs at the centre of proteins found in tooth enamel, makes teeth stronger and more resilient, according to a new research. University of Illinois-Chicago (UI-C) researchers compared proline repeats in amphibian and animal models and discovered that when the repeats are short, such as in frogs, teeth will not have the enamel prisms that are responsible for the strength of human enamel. Conversely, when the proline … full story