4HQ0:
reference: Structural asymmetry of procaspase-7 bound to a specific inhibitor., Kang HJ, Lee YM, Bae KH, Kim SJ, Chung SJ, Acta Crystallogr D Biol Crystallogr. 2013 Aug;69(Pt 8):1514-21. doi:, 10.1107/S0907444913010196. Epub 2013 Jul 18. PMID: 23897474

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