The helix-coil transition has been studied by high-resolution NMR for three watersoluble polypeptides. Such systems are better models for protein behavior than those in TFA-CDC13 solvent. An upfield shift of ~7 cps is observed for the a-CH peak of poly(bg1utamic acid) and poly-clysine as the helix c
The Solution Properties and Configurations of a Polyampholytic Polypeptide: Copoly-L-Lysine-L-Glutamic Acid
โ Scribed by P. Doty, K. Imahori and E. Klemperer
- Book ID
- 123670969
- Publisher
- National Academy of Sciences
- Year
- 1958
- Tongue
- English
- Weight
- 320 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0027-8424
- DOI
- 10.2307/89574
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The electric birefririgeiice of poly(L-glutamic acid) (PLGA) in methanol-water mixtnres has been measiired by the use of the rectangular pulse technique at 25ยฐC. The permanent dipole moment, the anisotropy of electriral polarizability, and the optical anisotropy factor of PLGA in solution were obtai
The objective has been to establish if those ions which are known to change the stability of the struct,ure of proteins, have any influence on the properties of ionizable polypeptides. Potentiometric titrations and complementary optical rotation data are presented for aqueous solutions of poly-L-lys
## Abstract The electric birefringence of poly(Lโglutamic acid) (PLGA) in methanol, dimethyl sulfoxide, dimethylformamide, __N__โmethylacetamide, trifluoroacetic acid, dioxaneโwater mixtures (3:1 and 4:1 by volume), and dioxaneโformamide mixture (1:1 by volume) has been measured by the use of the r