protein N-linked glycosylation keratan sulfate proteoglycan biosynthetic process keratan sulfate-I proteoglycan biosynthetic process https://github.com/geneontology/go-ontology/issues/30595 biological_process The chemical reactions and pathways resulting in the formation of keratan sulfate I (KS-I), N-linked via a GlcNAc attached to an asparigine residue in the target protein. 2025-07-23T09:39:33Z GO:0140263 N-linked GlcNac-keratan sulfate-I proteoglycan biosynthetic process pg