1EVX: Apo Crystal Structure Of The Homing Endonuclease, I-Ppoi
reference: Conformational changes and cleavage by the homing endonuclease I-PpoI: a critical role for a leucine residue in the active site., Galburt EA, Chadsey MS, Jurica MS, Chevalier BS, Erho D, Tang W, Monnat RJ Jr, Stoddard BL, J Mol Biol 2000 Jul 21;300(4):877-87. PMID: 10891275

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