DLPLTFGGGTK (TFA) is a surrogate peptide for pembrolizumab identification[1].
[1]. Chiu HH, et al. Development of a general method for quantifying IgG-based therapeutic monoclonal antibodies in human plasma using protein G purification coupled with a two internal standard calibration strategy using LC-MS/MS. Anal Chim Acta. 2018;1019:93-102.
















