Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A) Rotation angles ψ=Ocis−C′−Cα−N in the zwitterionic racemate and enantiomers (dashed) of l‐valine (Table 1, entries 1, 4, 8), looking down the C′−Cα bond (symbol C′α). B) Distortion of the planar system CαC′(O)O to a chiral flat tetrahedron (exaggerated). C) Attraction CαN/C′O: bending of C′−Ocis towards Cα−NH3. D) Conformation of valine in di‐ and tripeptides.
