作者:Kui Zhang、David M. Zimmerman、Alice Chung-Phillips、Carolyn J. Cassady
DOI:10.1021/ja00076a044
日期:1993.11
(n=1-6), were determined by proton transfer reactions in a Fourier transform ion cyclotron resonance mass spectrometer. The basicities were found to increase as the peptide chain length increased: 206.2, 215.3, 218.9, 225.0, 225.3, and 227.4 kcal/mol for n=1-6, respectively. Comparable results, but with some deviations, were obtained using the kinetic method of collision-induced dissociation on a protonbound
聚甘氨酸 Glyn (n=1-6) 的气相碱性通过在傅立叶变换离子回旋共振质谱仪中的质子转移反应确定。发现碱度随着肽链长度的增加而增加:对于 n=1-6,分别为 206.2、215.3、218.9、225.0、225.3 和 227.4 kcal/mol。使用质子结合二聚体上碰撞诱导解离的动力学方法获得了可比较的结果,但有一些偏差。甘氨酸和双甘氨酸之间碱度的巨大变化表明质子化形式的分子内氢键强度存在显着差异