Fig. 4From: New insights into the molecular mechanism of the Rab GTPase Sec4p activationCrystal structure of the ternary complex Sec4pV29.GDP.Sec2p. a Overall structure of the complex showing the presence of the GDP molecule bound in the active site. b Fo - Fc map contoured at 3σ (grey) indicates the presence of the nucleotideBack to article page