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So this is why you decided to continue and expand the IML-2 crystallisation studies on thermophilic aspartyl-tRNA synthetase and to crystallise the plant sweetening protein, thaumatin. While both proteins are biochemically stable and are purified easily, they also have significant structural and behavioural differences; therefore, they make interesting subjects for comparative crystallography studies. In addition, thaumatin tastes extremely sweet when consumed by humans. Since it appears to be non-toxic, non-carcinogenic, and low in calories, it may be a strong substitute for common table sugar. It all makes sense now.
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