Linked from
The 12 pages that link to Lysine, each with the reason it gives.
AcetylationRelated: Its side-chain amino group is a frequent protein acetylation site.
UbiquitinRelated: Ubiquitin chains often link through lysine residues.
SeitanRelated: Seitan’s low lysine content can be balanced with lysine-rich foods such as legumes.
BiotinRelated: Biotin is covalently attached to a lysine residue in biotin-dependent enzymes.
Glutaric acidRelated: Lysine degradation can generate glutaric acid as an intermediate.