Fig. 2From: The Function of Rac Small GTPase and Associated Proteins in Rice Innate ImmunityFunction of Rac/Rop small GTPases in plants. Small GTPases in the Rac family work as molecular switches by cycling between GDP-bound inactive and GTP-bound active forms in cells. The active GTP-bound form of Rac proteins bind to specific downstream effectors and thereby participate in various cellular events.Back to article page