Poly-0-acetyl-hydroxy-L-proline, forms I and I1 have been studied by optical rotatory dispersion (ORD) and ultraviolet spectrophotometry in solution and in the solid state. Cotton effects of opposite sign, but not mirror images, were observed in the 250 mp region for the two forms (Form I, peak 278
Heat precipitation of poly (γ-hydroxy-L-proline)
✍ Scribed by D. S. Clark; J. J. Dechter; L. Mandelkern
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1978
- Tongue
- English
- Weight
- 241 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0006-3525
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Single crystals of POAHP I1 were grown from acetic anhydride, a solvent in which POAHP I is thought to be stable. The single crystals gave an electron diffraction pattern whichospecified a hexagonal unit cell and the lateral spacing between molecular chains (11.4 A). There is reasonable indication t
The synthesis of hydroxyproline-based telechelic prepolymers by the condensation polymerization of trans-4-hydroxy-N-benzyloxycarbonyl-L-proline methyl ester was investigated. All the polymerizations were carried out in the melt with stannous octoate as the catalyst and with different diols. The pro
## Abstract Studies have been made of the precipitation of poly‐L‐glutamic acid from dilute aqueous solutions, over the pH range where the α‐helical conformation is maintained. The major purpose is to establish the molecular conformation in the precipitate and to outline the mechanism of the precip