Linear peptide H-Pro-Thr(Psi(Me,Me)pro)-Pro-OH containing a preformed cis-Pro-Thr(Psi(Me,Me)pro) tertiary amide bond cyclises instantaneously and free of formation of oligomeric structures to the cyclic tripeptide cyclo-[Pro-Thr(Psi(Me,Me)pro)-Pro]. Even a ...
1999