| Abstract: | Summary 1. Spatial forms of Ac-L-Ala-L-Pro-L-Ala-NHMe with trans peptide bonds are the most preferred. Elongation of the peptide chain promotes the stabilization of the trans configuration of the tertiary amide group.2. In the structure of the compound investigated, the dominating role is played by the interaction of the neighboring residues.3. Of the six types of conformations of X-Pro-Y observed in proteins, the first four belong to the preferred forms of the Ac-L-Ala-L-Pro-L-Ala-NHMe molecule.M. M. Shemyakin Institute of Bioorganic Chemistry, Academy of Science of the USSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 626–630, September–October, 1975. |
