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Helix–coil transition in poly(γ-benzyl-L-glutamate) and poly-ε-carbobenzoxy-L-lysine

✍ Scribed by M. Cortijo; A. Roig; F. Garcia Blanco

Publisher
Wiley (John Wiley & Sons)
Year
1969
Tongue
English
Weight
440 KB
Volume
7
Category
Article
ISSN
0006-3525

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✦ Synopsis

In this paper two points are considered: the methods of evaluating the helical content 8 and the calculation of the parameters of the transition from experimental data and its interpretation. The parameter AH obtained is in good agreement with the calorimetric one and v is found to be independent of temperature and solvent and in agreement with the ordinarily accepted value for poly(y-benzyl-L-glutamate). The different methods of estimating 8 are discussed for both polypeptides.

📜 SIMILAR VOLUMES

Helix–coil transition in copolypeptides.
Helix–coil transition in copolypeptides. II. Poly(γ-benzyl L-glutamate-co-ε-carbobenzoxy-L-lysine)
✍ A. Roig; F. García Blanco; M. Cortijo 📂 Article 📅 1971 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 353 KB

## Abstract The thermal helix–coil transition of poly(γ‐benzyl L‐glutamate‐__co__‐ε‐carbobenzoxy‐L‐lysine) copolypeptides was studied in solvent mixtures of different compositions. The cooperativity parameter __v__ changes linearly with polymer (and solvent) composition, whereas the heat of the tra

Helix–coil transition in copolypeptides.
Helix–coil transition in copolypeptides. I. Poly (γ-benzyl-co-γ-methyl L-glutamate)
✍ A. Roig; M. Cortijo 📂 Article 📅 1971 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 361 KB

## Abstract The helix–coil transition in poly(γ‐benzyl L‐glutamate‐__co__‐γ‐methyl L‐glutamate) copolypeptides was studied experimentally in nonaqueous solvents and the results compared with theory. It is found that the transition can be described by the same theory as for the homopolypeptides, but

Helix–coil transition of poly(γ-benzyl-L
Helix–coil transition of poly(γ-benzyl-L-glutamate) in the dioxane–dichloroacetic acid mixture
✍ A. K. Gupta; C. Dufour; E. Marchal; H. Benoit 📂 Article 📅 1975 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 367 KB

## Abstract The thermal helix–coil transition of four samples of poly(γ‐benzyl‐L‐glutamate) in the dioxane–dichloroacetic acid (DCA) mixture was studied by optical rotatory dispersion method. The transition occurred at very high DCA content (97.5% by weight) in this system. The transition parameter

Enthalpy of helix–coil transitions from
Enthalpy of helix–coil transitions from heats of solution. II. Poly-ε-carbobenzoxy-L-lysine and copolymers with L-phenylalanine
✍ Giovanni Giacometti; Angklo Turolla; Renzo Boni 📂 Article 📅 1970 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 352 KB

## Abstract The heal of solution of Poly‐ε‐carbobenzoxy‐L‐lysine and of a series of its copolymers with phenylalanine was measured as a function of solvent composition. The enthalpy change of the helix‐to‐coil transition was estimated for the various cases. The previous findings that side chains do

Carbon-13 and proton nmr studies of heli
Carbon-13 and proton nmr studies of helix–coil transition of poly(γ-benzyl-L-glutamate)
✍ Yasuyuki Suzuki; Yoshio Inoue; Riichirô Chûjô 📂 Article 📅 1975 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 358 KB

## Abstract The helix–coil conformational transition undergone by poly(γ‐benzyl‐L‐glutamate) in solutions of trifluoroacetic acid and deuterated chloroform was studied by proton and carbon‐13 nmr. The results indicate that in the case of the solvent‐induced helix–coil transition, the side chain ass