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Vibrational spectrum of cyclic tetra-L-alanine

✍ Scribed by V. D. Gupta; R. D. Singh


Publisher
Wiley (John Wiley & Sons)
Year
1972
Tongue
English
Weight
436 KB
Volume
11
Category
Article
ISSN
0006-3525

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✦ Synopsis


A normal coordinate analysis for cyclic tetra-Lalanine molecule is reported. A comparison of amide modes and other low-frequency vibrations sensitive to conformational changes is made with t.hose in poly-Lalanine. Intramolecular coupling coefficients are calculated using perturbation treatment.


πŸ“œ SIMILAR VOLUMES


Breathing vibration of poly-L-alanine Ξ±-
✍ Koichi Itoh; Takehiko Shimanouchi πŸ“‚ Article πŸ“… 1971 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 105 KB πŸ‘ 1 views

## Breathing V i b r a t i o n of Poly-1-alanine a-Helix I n a previous paper' the normal frequencies and modes were calculated for the poly-1,-alanine a-helix, arid the far-infrared ahsorpt,iori barids arid their dichroism were interpreted. Almost all the calculated vibrations have their correspo

Ab initio-based vibrational analysis of
✍ Sang-Ho Lee; Samuel Krimm πŸ“‚ Article πŸ“… 1998 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 445 KB πŸ‘ 1 views

Polarized ir and Raman spectra have been obtained on oriented films of a-helical poly(L-alanine) (a-PLA) and its N-deuterated derivative. These improved spectra permit a more complete assignment of observed bands to A-, E 1 -, and E 2 -species modes. A new empirical force field has been refined, bas

Raman spectrum of the right-handed Ξ±-hel
✍ J. L. Koenig; P. L. Sutton πŸ“‚ Article πŸ“… 1969 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 261 KB πŸ‘ 1 views

The laser-excited Raman vibrational spectrum of poly-L-alanine has been obtained. The Raman spectrum is compared with the infrared spectrum and vibrational frequencies calculated from normal coordinate analysis. The symmetric modes of the a-helix appear with strong intensity in the ltaman spectrum.

Vibrational circular dichroism of polype
✍ Usha Narayanan; T. A. Keiderling; G. M. Bonora; C. Toniolo πŸ“‚ Article πŸ“… 1985 πŸ› Wiley (John Wiley & Sons) 🌐 English βš– 342 KB πŸ‘ 1 views

## Abstract Vibrational CD (VCD) and ir absorption data are reported for a series of films of Boc‐(L‐Ala)~__n__~‐OMe homo‐oligopeptides (__n__ = 3–7) in the amide I and A regions. The data evidenced a sharp change between __n__ = 3 and __n__ = 4, which parallels the onset of β‐structure formation,