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α-Helix to random coil transitions: Interpretation of the CD in the region of linear temperature dependence

✍ Scribed by Marilyn Emerson Holtzer; Alfred Holtzer

Publisher
Wiley (John Wiley & Sons)
Year
1992
Tongue
English
Weight
283 KB
Volume
32
Category
Article
ISSN
0006-3525

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📜 SIMILAR VOLUMES

α-helix to random coil transitions: Dete
α-helix to random coil transitions: Determination of peptide concentration from the CD at the isodichroic point
✍ Marilyn Emerson Holtzer; Alfred Holtzer 📂 Article 📅 1992 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 305 KB 👁 1 views

A method is presented for determining the concentrations of peptides and proteins having isodichroic points near 203 nm. The existence of an isodichroic point for a given substance indicates a local two-state (a-helix, random coil) population. The mean residue ellipticity at the isodichroic point, [

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We use heat capacity data of Taylor et al. to calculate the enthalpy distribution of a model peptide using the moments/maximum-entropy method. The peptide was designed with small covalent loops at both ends of the molecule to nucleate ␣-helix thus giving a system that would be expected to show a hel