4PEP: The Molecular And Crystal Structures Of Monoclinic Porcine P Refined At 1.8 Angstroms Resolution
reference: Molecular and crystal structures of monoclinic porcine pepsin refined at 1.8 A resolution., Sielecki AR, Fedorov AA, Boodhoo A, Andreeva NS, James MN, J Mol Biol 1990 Jul 5;214(1):143-70. PMID: 2115087

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