Glycan reductive amino acid coded affinity tagging (GRACAT) for highly specific analysis of N-glycome by mass spectrometry

N-glycans are involved in a variety of biological processes and associated with many diseases. However, the sensitive and specific detection of glycans via mass spectrometry (MS) remains challenging due to their relatively low abundance and low ionization efficiency. In this work, a new method termed glycan reductive amino acid coded affinity tagging (GRACAT) is developed to address these problems. Through labeling the reducing ends of glycan...