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Ras (A–C) and Rho (D–F) conformations from crystallography and simulation. Crystallographic GTP conformers are colored red, GDP green, and nucleotide free conformers gray. The distribution of MD conformers is depicted with density-shaded blue points from (A) Ras nucleotide free, (B) Ras GTP-bound, (C) Ras GDP-bound, (D) Rho nucleotide free, (E) Rho GTP-bound, and (F) Rho GDP-bound simulations.
