| distance geometry |
REFINEMENT DETAILS CAN BE FOUND IN THE JRNL CITATION ABOVE. THE NMR STUDY HAS BEEN CONDUCTED USING THE SYNTHETIC PEPTIDE WITH METHIONINE 243 REPLACED BY NORLEUCINE. SUCH AN ISOSTERIC REPLACEMENT USUALLY DOES NOT AFFECT THE PEPTIDE CONFORMATION, WHILE SYMPLIFYING THE SYNTHESIS. TO AVOID DIFFICULTIES WHICH MAY ARISE FROM THE PRESENCE OF A NONSTANDARD AMINO ACID RESIDUE AS WELL AS FOR THE PURPOSE OF AGREEMENT BETWEEN THE NATIVE M2 FRAGMENT AND THE CONFORMERS TO BE DEPOSITED, THE NORLEUCINE RESIDUE WAS REPLACED BY METHIONINE. |
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