STRUCTURE OF A PHOTOACTIVATABLE RAC1 CONTAINING THE LOV2 C450M MUTANT TRANSFERASE, CELL ADHESION, NUCLEOTIDE-BINDING, PROTEIN ENGINEERING, RAS SUPERFAMILY LOV2, PHOTOTROPIN1, PROTEIN DESIGN, SMALL G-PROTEIN, LIGHT-INDUCED SIGNAL TRANSDUCTION, GTPASE, RHO FAMILY, ATP-BINDING, PRENYLATION, CHIMERA, NUCLEOTIDE-BINDING PROTEIN ENGINEERING, ALTERNATIVE SPLICING, ADP-RIBOSYLATION 2WKR