4M9R:
reference: Mechanistic insights into CED-4-mediated activation of CED-3., Huang W, Jiang T, Choi W, Qi S, Pang Y, Hu Q, Xu Y, Gong X, Jeffrey PD, Wang J, Shi Y, Genes Dev. 2013 Sep 15;27(18):2039-48. doi: 10.1101/gad.224428.113. PMID: 24065769

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