On the base of a semiempirical computational method is suggested a scheme to the study conformational aspects of structurefunction relationships of biologically active peptides. As an example have been investigated the conformational properties of some monosubstituted analogs of the tachykinin neuropeptide, substance P, by theoretical conformational analysis method. Calculations indicated that the spatial structure of these synthetic analogs monosubstituted with L-alanine and D-alanine in the all positions ma…
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