SIGNALING REGULATOR, GAP, GTPASE ACTIVATION, GTPASE-ACTIVATING PROTEIN, HEMIHEDRAL TWINNING, LEUCINE-RICH REPEAT PROTEIN, LRR, MEROHEDRAL TWINNING, MEROHEDRY, RANGAP, RNA1P, SIGNALING PROTEIN, SIGNALING ACTIVATOR, NUCLEAR TRANSPORT MIRAS STRUCTURE DETERMINATION FROM HEMIHEDRALLY TWINNED CRYSTALS 2CA6