[Conformation analysis of L-pyroglutamic acid N-methylamide by depolarized Rayleigh diffusion, vibration spectroscopy, and conformational energy calculation].
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Amides↗
Biomedical subjects
Publications and source records attributed to D E Blagdon.
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Semiempirical energy calculations were performed to determine the conformation of the thyrotropin-releasing factor, L-pyroglutamyl-L-histidyl-L-prolineamide. Our results strongly suggest a "hairpin turn" conformation stabilized by two specific hydrogen bonds. Experimental support for this structure was obtained from proton magnetic resonance by use of chemical shifts and coupling constants with the implied dihedral angles.