An investigation of the conformational states of the methylamide of N-acetyl-L-histidine

Summary 1. All the conformational states of the methylamide of N-acetyl-L-histidine have been calculated.2. It has been shown that in the case of the tautomer of the imidazole ring with a hydrogen atom on the atom, form R of the main chain is preferred, and in the tautomer with the proton on and also in the protonated state of the side chain B forms are preferred.3. The conformational equilibrium is displaced in the direction of form I.M. M. Shemyakin Institute of Biochemistry, Academy of Sciences of the USSR, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 371–378, May–June, 1976.