On the helical conformation of un-ionized poly(γ-d-glutamic acid)
✍ Scribed by David Zanuy; Carlos Alemán; Sebastián Muñoz-Guerra
- Book ID
- 117314846
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 418 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0141-8130
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## Abstract Measurement of the optical rotatory dispersion spectra of poly‐γ‐D‐glutamic acid (obtained from __Bacillus anthracis__) dawn to 200 nm wavelength reveal difference between the unionized and ionized froms. The profile of the unionized polyacid shows similarities to those obtained for α‐h
The optical rotatory dispersion in the range 630-340 mp has been measured for aqueous solutions of the tetramethylammonium salt of a-poly-L-glutamic acid to compare the effects produced by added tetramethylammonium chloride and magnesium chloride at equivalent ionic strengths. The addition of magnes
The effect of the binding of the alkaline earth cations and of cupric and lanthanum ions on the dissociation of the sidechain carboxyl groups in a-poly-kglutamic acid has been measured by a modified titration technique. The a-poly-bglutamic acid was pretitrated with the strong base of a weakly bound