This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is part of a special issue entitled Proceedings of the Beilstein Glyco-Bioinformatics Symposium 2015 with copyright© 2017 Beilstein-lnstitut. Published by Elsevier GmbH. All rights reserved.