{Reference Type}: Journal Article {Title}: Bioinformatics Resources for the Study of Glycan-Mediated Protein Interactions. {Author}: Lisacek F; {Journal}: J Vis Exp {Volume}: 0 {Issue}: 179 {Year}: 01 2022 20 {Factor}: 1.424 {DOI}: 10.3791/63356 {Abstract}: The Glyco@Expasy initiative was launched as a collection of interdependent databases and tools spanning several aspects of knowledge in glycobiology. In particular, it aims at highlighting interactions between glycoproteins (such as cell surface receptors) and carbohydrate-binding proteins mediated by glycans. Here, major resources of the collection are introduced through two illustrative examples centered on the N-glycome of the human Prostate Specific Antigen (PSA) and the O-glycome of human serum proteins. Through different database queries and with the help of visualization tools, this article shows how to explore and compare content in a continuum to gather and correlate otherwise scattered pieces of information. Collected data are destined to feed more elaborate scenarios of glycan function. Glycoinformatics introduced here is, therefore, proposed as a means to either strengthen, shape, or refute assumptions on the specificity of a protein glycome in a given context.