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. 2018 Jul 26;74(Pt 8):463–472. doi: 10.1107/S2053230X18004016

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© van Beusekom et al. 2018

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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The sialoglycopeptide from glycophorin A (chain D of PDB entry 2cwg; Wright & Jaeger, 1993 ▸) required multiple reannotation events: a LINK record was added to connect the threonine side chain to the central carbohydrate residue, the central residue NDG was renamed A2G (α-d-GalpNAc) and a LINK record between GAL and A2G was rewritten to correctly describe the leaving atom O1. The dotted line represents a glycosidic linkage that was already present in the PDB entry but is not displayed by CCP4mg.