5EJN:
reference: Divergent evolution of vitamin B9 binding underlies Juno-mediated adhesion of mammalian gametes., Han L, Nishimura K, Sadat Al Hosseini H, Bianchi E, Wright GJ, Jovine L, Curr Biol. 2016 Feb 8;26(3):R100-1. doi: 10.1016/j.cub.2015.12.034. PMID: 26859261

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