Fig. 1: Defucosylation of IgG.

a Antibodies are treated with an endoglycosidase, leaving an N-linked disaccharide. b Alpha-fucosidase defucosylation proceeds through a Koshland double-displacement reaction with retaining stereochemistry. c Mass spectrometry of AlfC-treated Rituximab in the presence of EndoS2; d AlfC-treated Rituximab in the absence of EndoS2. Mass spectrometry plots have been re-traced and overlaid for clarity. Source data are provided as a Source Data file.