it describes the genes that control the synthesis in a selected host microorganisms, polypeptides of thaumatin i with improved taste characteristics.these polypeptides are characterized by the fact that they have the amino acid sequence of the thaumatin i, naturalwith the exception of a residue of the amino acid lysine substituting asparagine in position. at the end of the amino terminus.a residue of the amino acid aspartate and asparagine at position 113 to replace from the tip of the amino terminus.and the residue of the amino acid aspartate, replacing the lysine residue is at the level of 97 residue level. from the end of the amino terminus.
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