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Enthalpy of helix–coil transition from heat of solutions. III. Poly-N-δ-carbobenzoxy-L-ornithine and poly-N-γ-carbobenzoxy-L-α,γ-aminobutyric acid

✍ Scribed by G. Giacometi; A. Turolla; A. S. Verdini; Snam


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

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Helix–coil transition of poly-γ-N-carbob
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## Abstract The helix–coil transition of poly‐γ‐__N__‐carbobenzoxy‐L‐α,γ‐diaminobutyrate (PCLB) and poly‐δ‐__N__‐carbobenzoxy‐L‐ornithine (PCLO) in chloroform–dichloroacetic acid mixtures was followed by optical rotatory dispersion. PCLB displays a “normal” temperature‐induced transition, but PCLO

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## 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