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. 2014 Oct 30;6(5):1190–1200. doi: 10.4161/mabs.29889

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Figure 4. — (A) Reglycosylation of G0F glycoform using the mutant enzyme β1,4Gal-T1-Y289L and UDP-2-keto-Gal as sugar donor. A peak at 1889.6 m/z corresponds to the G2F glycoform, indicating the β-galactosidase treated IgG1 m860 having a G0F glycoform are fully galactosylated to the G2F glycoform after transfer of C2-keto-Gal moiety to the terminal GlcNAc residues. (B) Antibody-drug conjugation through oximation reaction. A peak at 3637 m/z corresponds to conjugated glycan with both arms attached with nAF.