. "Any process that activates or increases the frequency, rate or extent of Rho guanyl-nucleotide exchange factor activity." . . . "positive regulation of Rho guanyl-nucleotide exchange factor activity" . "positive regulation of Rho guanine nucleotide exchange factor" . "positive regulation of RhoGEF" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .