## Abstract The conformational properties of block copolymers of polyβLβleucine in water have been examined. The degree of polymerization of the polyβLβleucine block was 11 and 21, respectively, for samples prepared by the Merrifield procedure, and 56 for a sample prepared by the polymerization of
Effect of hydrophobic bonding on the stability of poly-L-alanine helices in water
β Scribed by Mordechai Bixon; Harold A. Scheraga; Shneior Lifson
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1963
- Tongue
- English
- Weight
- 541 KB
- Volume
- 1
- Category
- Article
- ISSN
- 0006-3525
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract The potentiometric titration of random copolymers of Lβlysine and Lβalanine containing 0β35% alanine was carried out. The standard freeβenergy change for the transition of coil to helix was calculated from the titration curve, and was treated by taking account of firstβneighbor interact
Polarized ir spectra of oriented films of β£-helical poly(L-alanine) (β£-PLA) have been obtained as a function of residual solvent dichloroacetic acid (DCA). The amide A, B, II, and V regions exhibit multiple bands whose structure depends on the residual DCA content, and those associated with the β£ I
High-resolution nuclear magnetic resonance spectra at 100 MHz have been obtained on poly-iV-methyl-L-alanine in the chloroform-trifluoroacetic acid system under various conditions of solvent composition. Different spectra are observed for the CH,-C,, C,-H, and N-CHI protons. On the basis of conforma