We have measured the VCD of polytyrosine in the amide I and I1 regions in dimethyl sulfoxide (DMSO) and in 8020 mixtures of DMSO with trifluoroethanol, trifluoroacetic acid (TFA), and dichloroacetic acid and in 50:50 mixtures of DMSO and trimethyl phosphate (TMP). Additionally, VCD was obtained for
Spectroscopic studies of random chain and α-helical polypeptides in hexafluoroisopropanol
✍ Scribed by Joseph R. Parrish Jr.; Elkan R. Blout
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1971
- Tongue
- English
- Weight
- 1023 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0006-3525
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## Abstract Vibrational CD (VCD) of amides A, I, and II vibrations of a variety of polypeptide films have been measured. VCD of films of α‐helical and β‐sheet structures are compared in the three regions. Reproducible spectra could only be obtained for thin films free of orientation dependence. The
## Synopsis We have measured the vibrational CD (VCD) of a series of hetermligopeptides-onitrophenylsulfenyl(L-Met-L-Met-L-Leu),-OEt, n = 6,8,10,11--in the amide A, I, and I1 regions. These spectra are identical in shape and magnitude, within our signal to noise limits. The VCD in each band are o
## Abstract The thermal denaturation of α‐lactalbumin was studied at pH 7.0 and 9.0 in aqueous 1,1,1,3,3,3‐hexafluoroisopropanol (HFIP) by high‐sensitivity differential scanning calorimetry. The conformation of the protein was analyzed by a combination of fluorescence and circular dichroism measure
Absorption spectra and induced CD have been measured on aqueous solutions of watersoluble porphyrins with a-helical poly (L-glutamic acid) or a-helical poly (L-lysine) a t different mixing ratios. For the former, porphyrin is porphine-meso-tetra (4-N-methylpyridinium) (TMpyP) , and for the latter, i
## Abstract Intensities and other spectral parameters of infrared amide I and II bands of α‐helical polypeptides in solutions have been determined for poly(γ‐benzylglutamate), poly(γ‐ethylglutamate), and polymethionine in chloroform, polylysine, poly(glutamic acid), and fibrillar protein tropomyosi