Nmr studies in solution of poly-L-proline

  title={Nmr studies in solution of poly-L-proline},
  author={F. Conti and Massimo Piattelli and P. Viglino},
The isomerization of poly-L-proline in different solvents has been studied by NMR spectroscopy. Different resonance signals for the CHα protons have been obtained for the two different helical conformations of thus compound, namely form I and form II. 
4 Citations
NMR investigations of proline and its derivatives. 4-Proton magnetic resonance parameters and structure of acetyl-proline amide.
The proton magnetic resonance (PMR) spectrum of acetyl-proline amide in D2O solution has been analysed by computer simulation and it follows that both isomers are puckered with Cgamma in an endo position, but the cis isomer is more rigid than the trans isomer, which moreover undergoes a small interconversion of the CGamma and Cdelta atoms between two extreme spatial positions. Expand
Conformational study of the salivary proline-rich polypeptides.
The conformational study of three proline-rich polypeptides of human whole saliva, with known primary structures, was performed by CD and 1H-n.r.m. spectra measurements and the continuous prolyl residues in the third was suggested to take the same structure as the others. Expand
The effects of isolated N‐methylated residues on the conformational characteristics of polypeptides
It is observed that L‐Ala and Gly residues that are either N‐methylated in their conformational freedom relative to the same residues in an unmethylated polypeptide chain and Gly surrounded by residues which are also unm methylated are observed. Expand
Aggregation of poly-L-proline II.


Proton Magnetic Resonance Studies of the Helix–Coil Transition in Polypeptides
In proton magnetic resonance studies of polypeptides in solution, the spectral behaviour of the α-CH proton peak depends on the nature of the solvent system, the side chain and the molecular weight.Expand
Mutarotation of Poly-L-proline
THE synthesis and some of the properties of poly-L-proline were described recently1. A sample with an average degree of polymerization n = 67 which was obtained by bulk polymerization, dissolved inExpand
Nuclear magnetic resonance studies of helix-coil transitions in polyamino acids.
High-resolution proton magnetic resonance spectra along with chemical shift and line-width data are presented and discussed for the following polyamino acids throughout their helix-coil transition regions, indicating that there is a rapid interconversion between helical and non-helical regions of the polymers. Expand
Van Der Waals Interaction and the Stability of Helical Polypeptide Chains
The testing of distance and near visual acuity and colour vision, however, is not in itself sufficient for a complete assessment of a person's visual fitness and suitability for his or her job. Expand
Reverse mutarotation of poly-L-proline.