Staudinger Ligation: A Peptide from a Thioester and Azide
摘要:
The technique of native chemical ligation enables the total chemical synthesis of proteins. This method is limited, however, by an absolute requirement for a cysteine residue at the ligation juncture. Here, this restriction is overcome with a new chemical ligation method in which a phosphinobenzenethiol is used to link a thioester and azide. The product is an amide with no residual atoms.
Selenocysteine in Native Chemical Ligation and Expressed Protein Ligation
作者:Robert J. Hondal、Bradley L. Nilsson、Ronald T. Raines
DOI:10.1021/ja005885t
日期:2001.5.1
Instruments. NMR spectra were obtained with Bruker AC-300 and Varian UNITY-500 spectrometers. Mass spectra were obtained with PerkinElmer Sciex API 365 electrospray ionization (ESI) and Bruker Biflex III matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) instruments at the University of Wisconsin Biotechnology Center. Ultraviolet and visible absorbance was recorded with a Cary
仪器。NMR 谱是用 Bruker AC-300 和 Varian UNITY-500 光谱仪获得的。使用威斯康星大学生物技术中心的 Perkin Elmer Sciex API 365 电喷雾电离 (ESI) 和 Bruker Biflex III 基质辅助激光解吸/电离飞行时间 (MALDI-TOF) 仪器获得质谱。紫外和可见光吸光度用来自 Varian 的配备有 Varian 温度控制器的 Cary Model 3 UV/VIS 分光光度计记录。