4JND:
reference: Structural insight into Caenorhabditis elegans sex-determining protein FEM-2., Zhang Y, Zhao H, Wang J, Ge J, Li Y, Gu J, Li P, Feng Y, Yang M, J Biol Chem. 2013 Jul 26;288(30):22058-66. doi: 10.1074/jbc.M113.464339. Epub, 2013 Jun 11. PMID: 23760267

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