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The structure of Rab escort protein 1 (REP‐1; beige) in relation to Rab geranyl transferase (white) and Ras‐associated protein 7 (RAB 7; pink) and its substrate geranylgeranyl (GER; blue). The REP‐1 double mutant, L80F and M443V, is highlighted in panel B (green); the Q273H (red) and L457P (red) mutations are in panels C and D, respectively.
