Hydrogen−Deuterium Exchange and Selective Labeling of Deprotonated Amino Acids and Peptides in the Gas Phase
作者:Zhixin Tian、Lev Lis、Steven R. Kass
DOI:10.1021/ja076599l
日期:2008.1.1
Hydrogen-deuterium exchange reactions of deprotonated amino acids and small peptides were studied. Selective labeling can be carried out at the alpha-amino group of lysine (2 of 4 labile hydrogens undergo exchange with CF3CH2OD) and the guanidine side chain of arginine (3 of 6 labile hydrogens undergo exchange with CH3CH2OD and C6H5CH2OD). Differential labeling of peptides also was accomplished, and the extent of
研究了去质子化氨基酸和小肽的氢-氘交换反应。可以在赖氨酸的 α-氨基(4 个不稳定氢中的 2 个与 CF3CH2OD 交换)和精氨酸的胍侧链(6 个不稳定氢中的 3 个与 CH3CH2OD 和 C6H5CH2OD 交换)进行选择性标记。还完成了肽的差异标记,H/D 交换的程度取决于存在的氨基酸以及它们在链中的顺序。