Chalcogen-analogs of amino acids. Their use in X-ray crystallographic and folding studies of peptides and proteins.


Using methionine-auxotrophic Escherichia coli strains quantitative biosynthetic replacement of the methionine residues by seleno- and telluromethionine but not by methoxinine was achieved in various model proteins, clearly indicating a limited tolerance in the editing range of methionyl-tRNA synthetase. For expression of the protein variants the acetyl… (More)


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