4BY5:
reference: The guanine-exchange factor Ric8a binds the calcium sensor NCS-1 to regulate synapse number and probability of release., Romero-Pozuelo J, Dason JS, Mansilla A, Banos-Mateos S, Sardina JL, Chaves-Sanjuan A, Jurado-Gomez J, Santana E, Atwood HL, Hernandez-Hernandez A, Sanchez-Barrena MJ, Ferrus A, J Cell Sci. 2014 Jul 29. pii: jcs.152603. PMID: 25074811

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