4OIY:
reference: C-terminal motif within Sec7 domain regulates guanine nucleotide exchange activity via tuning protein conformation., Qiu B, Zhang K, Wang S, Sun F, Biochem Biophys Res Commun. 2014 Mar 28;446(1):380-6. doi:, 10.1016/j.bbrc.2014.02.125. Epub 2014 Mar 5. PMID: 24613384

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