NUCLEAR MAGNETIC-RELAXATION OF ALPHA-C-13-NUCLEI OF HELICAL POLY(GAMMA-HEXYL-L-GLUTAMATE) AND POLY(GAMMA-BENZYL-L-GLUTAMATE)

被引：13

作者：

RABY, P

BUDD, PM

HEATLEY, F

PRICE, C

机构：

[1] Department of Chemistry, University of Manchester, Manchester

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 1991年 / 29卷 / 04期

关键词：

D O I：

10.1002/polb.1991.090290407

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Spin-lattice relaxation times (T1), spin-spin relaxation times (T2), and nuclear Overhauser enhancements (NOE), at 75.5 MHz are reported for alpha-C-13 nuclei of poly (gamma-benzyl-L-glutamate) in deuterated dimethylformamide at 60-degrees-C and of poly(gamma-hexyl-L-glutamate) in cyclohexanone at 48 and 79-degrees-C. It is shown that for molecular weights above 10(5), the polypeptides cannot be considered as essentially rigid helices with internal librational motions; additional backbone flexing motions contribute to the relaxation behavior.

引用

页码：451 / 456

页数：6

共 18 条

[1]

ABRAHAM RJ, 1978, PROTON CARBON 13 NMR, P10

[2] THE STRUCTURE OF SOME PROTEINS AS REVEALED BY AN X-RAY SCATTERING METHOD [J].