Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S1044-7431(99)90745-5
free resource GlyGen glycoinformatics resource https://glygen.org/publication/PubMed/10328883/
free resource Mouse Genome Informatics (MGI) http://www.informatics.jax.org/reference/10328883