3FL0:
reference: Towards an antitumor form of bovine pancreatic ribonuclease: The crystal structure of three non-covalent dimeric mutants., Merlino A, Krauss IR, Perillo M, Mattia CA, Ercole C, Picone D, Vergara A, Sica F, Biopolymers. 2009 Mar 11. PMID: 19280639

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