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 Representative α-substituted L-Pro analogs discussed in this article (see Table S1 for structural details). b A schematic showing the effect (steric clash in the cis conformation) of α-substitution on cis/trans equilibrium. c A schematic showing the effect (steric clash in the endo puckered state) of α-substitution on endo/exo equilibrium. d Ramachandran plot for α-substituted L-Pro and D-Pro analogs (circle trans; triangle cis)
