4BFH:
reference: Discovery and Characterization of Pseudocyclic Cystine-Knot alpha-Amylase Inhibitors with High Resistance to Heat and Proteolytic Degradation., Nguyen PQ, Wang S, Kumar A, Yap LJ, Luu TT, Lescar J, Tam JP, FEBS J. 2014 Jul 21. doi: 10.1111/febs.12939. PMID: 25040200

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