5ER2:
reference: High-resolution X-ray diffraction study of the complex between endothiapepsin and an oligopeptide inhibitor: the analysis of the inhibitor binding and description of the rigid body shift in the enzyme., Sali A, Veerapandian B, Cooper JB, Foundling SI, Hoover DJ, Blundell TL, EMBO J 1989 Aug;8(8):2179-88. PMID: 2676515

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