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X-Ray studies on the conformation of poly-Nγ-carbobenzoxy-L-α,γ-diaminobutyric acid and poly-Nδ-carbobenzoxy-L-ornithine

✍ Scribed by A. Del Pra; P. Spadon; G. Valle

Publisher
Wiley (John Wiley & Sons)
Year
1973
Tongue
English
Weight
216 KB
Volume
12
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

X‐ray diagrams from oriented films and fibers of poly‐N^γ^‐carbobenzoxy‐L‐α,γ‐diaminobutyric acid (PCLB) and of poly‐N^δ^‐carbobenzoxy‐L‐ornithine (PCLO) have been examined. The conformation in the solid state for both polymers is that of an α‐helix, 18/5 for PCLB and 11/3 for PCLO, respectively.

Furthermore, while the PCLB molecules are packed in a trigonal lattice whose dimensions, on hexagonal axes, are a = 27.5 and c = 27.0 Å, the PCLO unit cell is monoclinic with a = 23.3, b = 22.7, c = 16.2 Å, and γ = 119.2°.

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