3RYT:
reference: Plexins Are GTPase-Activating Proteins for Rap and Are Activated by Induced Dimerization., Wang Y, He H, Srivastava N, Vikarunnessa S, Chen YB, Jiang J, Cowan CW, Zhang X, Sci Signal. 2012 Jan 17;5(207):ra6. PMID: 22253263

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