(a) NP-HPLC analysis of 2-AB labelled glycans released from purified AtaC which was co-expressed with NGT and α6GlcT in E. coli DH10β (black). (a) NP-HPLC analysis of 2-AB labelled glycans released from purified AtaC which was co-expressed with NGT and α6GlcT in E. coli DH10β (black). A glucose homopolymer (dextran) ladder serves as a reference for retention time (red). The peak originating from excess 2-AB label (rt = 4.1 min) is marked with an asterisk. (b,c) MALDI mass spectrometry analysis of the same glycan sample confirms the identity of the observed glycan chains as a hexose polymer. Jon Cuccui et al. Open Biol. 2017;7:160212 © 2017 The Authors.