A study of conformational stability of polyglycine and poly(L-alanine), and polyglycine/poly(L-alanine) blends in the solid state by (13)C cross-polarization/magic angle spinning NMR.
13C Cross-Polarization/Magic Angle Spinning nmr and T(1rhoH) experiments of polyglycine (PG), poly(L-alanine) (PLA), and PG/PLA blends prepared from dichloroacetic acid solution have been carried out, in order to elucidate the conformational stability of these polypeptides in the solid state. From these experimental results, it was clarified that the conformations of PG and PLA in their blends are strongly influenced by intermolecular hydrogen-bonding interactions that cause their miscibility at the molecular level.
Nakano
J
J
Department of Chemistry and Materials Science, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152, Japan.
Kuroki
S
S
Ando
I
I
Kameda
T
T
Kurosu
H
H
Ozaki
T
T
Shoji
A
A
D002247:Carbon Isotopes; D003999:Dichloroacetic Acid; D005782:Gels / Q000737:chemistry; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D010455:Peptides / Q000737:chemistry*; D017433:Protein Structure, Secondary; D012997:Solvents; D013816:Thermodynamics
D002247:Carbon Isotopes; D005782:Gels; D010455:Peptides; D012997:Solvents; C019529:polyalanine; C011080:polyglycine; D003999:Dichloroacetic Acid