The binding of the methylmercury cation CH3Hg+ by poly(L-glutamic acid) (PGA) and by poly(i-lysine) (PLL) has been investigated by b a n spectroscopy. Coordination on the side-chain COO-and NH; groups of these polypeptides gave characteristic ligand-Hg stretching modes at ca. 505 and 450 cm-', respe
The solution conformation of poly(L-lysine). A Raman and infrared spectroscopic study
✍ Scribed by Paul C. Painter; Jack L. Koenig
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1976
- Tongue
- English
- Weight
- 556 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0006-3525
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✦ Synopsis
Abstract
The Raman and infrared spectra of poly(L‐lysine) and poly(DL‐lysine) in solution are reported and the effects of various salts are investigated. The results demonstrate that α‐helix formation in solution is induced by specific salts and the spectral data support the hypothesis of regions of local order for poly(L‐lysine) in aqueous solutions of low ionic strength.
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## Abstract The frequencies and intensities of the laser Raman spectra of poly‐L‐lysine (PLL) have been observed in the following studies: (1) the thermally induced α‐to‐β transition which occurs with increasing temperature at high pH; (2) the ionized form to α transition at 10°C by increasing pH;
## Abstract The vibrational spectra of (C~5~H~12~NO~2~S^+^·NO~3~^−^) crystals were studied and the observed IR and Raman lines were assigned. The two protonated methioninium cations exist in two different conformations. Although the crystal structure is stabilized by a three‐dimensional network of
The absorption and circular dichroism spectra of the 1:l copolymer (L-LYS, L-Tyr), have been investigated in aqueous solutions at pH ranging from 3 to 13. The spectral patterns indicate that the fully charged polyampholyte assumes a nonperiodic conformation on the acid and basic sides of the isoelec
## Abstract Complexes of polyribocytidylic acid and polyriboadenylic acid with poly(L‐lysine) and poly(L‐arginine) were studied by Raman spectroscopy. The backbones of both polynucleotides are distorted by poly(L‐arginine). On the other hand, poly(L‐lysine) could distort the backbone of polyriboade