Spherulite of Poly-r-methyl-L-glutamate
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چکیده
منابع مشابه
An X-ray Diffraction Investigation of Poly-e-carbobenzoxy-L-lysine and a Complex Form of Poly-F-methyl-L-glutamate*
X-ray diagrams from oriented fibers of poly-s-carbobenzoxy-T,-lysine and a n e w form of poly7-methyl-T,-glutamate have been obtained. Spacing calculations and rough equatorial intensity measurements from the poly-s-carbobenzoxy-L-lysine photographs indicate tha t the molecules of this substance have the 3.60-residue a-helix configuration with one molecule in a simple hexagonal unit cell, a 0 -...
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CD and UV resonance Raman measurements surprisingly find that the charge screening of even 2 M concentrations of NaCl and KCl does not alter the unfolded PPII and 2.5(1)-helix conformations of poly-L-glutamate. These salts appear to be excluded from the region between the side chain charges and the peptide backbone. Furthermore, no direct ion pairing occurs between these salts and the side chai...
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In the title compound, C7H9NO5, alternative name N-carb-oxy-l-glutamic anhydride γ-methyl ester, the oxazolidine ring is essentially planar with a maximum deviation of 0.020 (3) Å. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds between the imino group and the carbonyl O atom in the methyl ester group, forming a tape structure along the a-axis direction. The tapes are linked by C-...
متن کاملThe effect of sodium chloride on poly-l-glutamate conformation.
A large-scale fully-atomistic molecular dynamics simulation of poly-l-glutamate demonstrates that a small amount of sodium chloride switches the preferred conformation from an extended conformation to a compact alpha-helix.
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Optically active poly(cis-5-methyl-L-proline) and poly(trans-5-methyl-L-proline) were synthesized from their respective N-carboxy-anhydrides (NCA). Analysis of the i.r., u.v., n.m.r., ORD, and CD spectra of the polymers showed that two different conformations of each polymer exist in the solid and in solution in appropriate solvents. Form I and form II of poly(trans-5-methylL-proline) were foun...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1962
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.65.5_834