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Activation of protein kinase C by elevation of glucose concentration: Proposal for a mechanism in the development of diabetic vascular complications
PNAS November 1, 1991 88 (21) 9907; https://doi.org/10.1073/pnas.88.21.9907e
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Amino acid variations at a single residue in an autoimmune peptide profoundly affect its properties: T-cell activation, major histocompatibility complex binding, and ability to block experimental allergic encephalomyelitis.
L Hood, S J Horvath, V Kumar, and J L Urban

PNAS August 1, 1991 88 (15) 6899; https://doi.org/10.1073/pnas.88.15.6899b

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