Rao, Ch. Pulla ; Balaram, P. ; Rao, C. N. R. (1983) 13C-n.m.r. studies of the conformational changes in proline oligomers brought about by lithium and calcium salts International Journal of Biological Macromolecules, 5 (5). pp. 289-295. ISSN 0141-8130
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/014181...
Related URL: http://dx.doi.org/10.1016/0141-8130(83)90044-2
Abstract
A detailed 13C-n.m.r. investigation has been carried out on the conformational changes in proline oligomers brought about by interaction with lithium and calcium perchlorates. Interaction of lithium and calcium salts with Piv-(Pro)n-OMe, n = 2, 4 and 5 results in trans-cis isomerization. In the case of pentaproline, metal salts also give rise to other trans-isomers caused by the rotation about the Cα---C(=O) bond (ψ, cis). Calcium salts seem to stabilize cis′-isomers and produce effects somewhat different from those of lithium salts.
| Item Type: | Article |
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| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Peptides; Proline Oligomers; 13C-n.m.r; Peptide Conformation; Salt Effects |
| ID Code: | 5056 |
| Deposited On: | 18 Oct 2010 05:20 |
| Last Modified: | 16 May 2016 15:37 |
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