A block copolymer [y-Et-~~-Glu], [~-Trp], was prepared using N-carboxy anhydrides (NCA) of L-tryptophan and y-ethyl DL-glutamate. The block copolymer, dissolved in trifluoroethanol (TFE)-dichloroacetic acid (DCA) mixtures, exhibited a sharp change in the specific rotation a t 546 mp when the solvent
β¦ LIBER β¦
Optical rotatory properties of poly-l-tryptophan
β Scribed by Michael Sela; Izchak Z. Steinberg; Ezra Daniel
- Book ID
- 115790133
- Publisher
- Elsevier Science
- Year
- 1961
- Weight
- 401 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0006-3002
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## Abstract Measurement of the optical rotatory dispersion spectra of polyβΞ³βDβglutamic 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 Ξ±βh