Scott J E, Heatley F, Moorcroft D, Olavesen A H
Biochem J. 1981 Dec 1;199(3):829-32. doi: 10.1042/bj1990829.
1H n.m.r. spectra in [2H6]dimethyl sulphoxide of dodecyltrimethylammonium salts of chondroitin sulphates and hyaluronate, or sodium salts of oligomers from hyaluronate, showed unambiguous NH signals. The acetamido NH occurs in two different environments: environment I ('normal') in simple sugars, and environment II (hydrogen-bonded NH) appearing in tri- or tetrasaccharides, indicating a secondary structure in hyaluronate (and some chondroitin sulphates) involving a hydrogen-bonded acetamido NH.
硫酸软骨素和透明质酸的十二烷基三甲基铵盐,或透明质酸低聚物的钠盐在[2H6]二甲基亚砜中的1H核磁共振谱显示出明确的NH信号。乙酰氨基NH出现在两种不同的环境中:简单糖类中的环境I(“正常”),以及三糖或四糖中出现的环境II(氢键结合的NH),这表明透明质酸(以及一些硫酸软骨素)中存在涉及氢键结合的乙酰氨基NH的二级结构。