Table 1 ELISA competition studies on RhoAQ63L coated plate. ScFvC1-N1N2 (0.4 μM) is competed by increasing concentrations of GST-RBD, GDP bound RhoA, GTP bound Cdc 42, GTP bound Rac 1. KD of GST-RBD was also determined by surface plasmon resonance on GST-RhoAQ63L.