6W8S:
reference: Structural basis for Ca(2+)-dependent activation of a plant metacaspase., Zhu P, Yu XH, Wang C, Zhang Q, Liu W, McSweeney S, Shanklin J, Lam E, Liu Q, Nat Commun. 2020 May 7;11(1):2249. doi: 10.1038/s41467-020-15830-8. PMID: 32382010

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