A MULTINUCLEAR NMR-STUDY ON THE MICROSCOPIC IONIZATION-CONSTANTS OF ADENOSINE-5'-TRIPHOSPHATE IN AQUEOUS-SOLUTION

被引：3

作者：

CRISPONI, G ^{[1
]}

NURCHI, V ^{[1
]}

CASU, M ^{[1
]}

LAI, A ^{[1
]}

机构：

[1] DIPARTIMENTO SCI CHIM,I-09124 CAGLIARI,ITALY

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 1993年 / 49卷 / 11期

关键词：

D O I：

10.1016/0584-8539(93)80122-Q

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A H-1, C-13 and P-31 NMR study of adenosine-5'-triphosphate has been performed as a function of pH. The examination of the chemical shifts allowed the proposal of an ionization scheme in which the third deprotonation takes place both on the adenine ring and on the phosphate group in a ratio of about 2:1. Furthermore, an analysis of carbon relaxation times supports this mechanism of ionization and confirms that the adenine ring binds the proton both on the NH2 group and the N7 nitrogen atom.

引用

页码：1643 / 1649

页数：7

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