3QNW:
reference: Structure of human caspase-6 in complex with Z-VAD-FMK: New peptide binding mode observed for the non-canonical caspase conformation., Muller I, Lamers MB, Ritchie AJ, Dominguez C, Munoz-Sanjuan I, Kiselyov A, Bioorg Med Chem Lett. 2011 Sep 15;21(18):5244-7. Epub 2011 Jul 21. PMID: 21820899

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