Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://www.pnas.org/doi/10.1073/pnas.1100992108?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
	free resource	GlyGen glycoinformatics resource	https://glygen.org/publication/PubMed/21518912/
	free resource	Mouse Genome Informatics (MGI)	http://www.informatics.jax.org/reference/21518912
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21518912/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/21518912