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Figure 3.
Figure 3 Interface surfaces of the Ras-Sos complex. a,
Residues of Ras that form direct interactions with Sos are shown
as red spheres; additional residues at the interface are orange
spheres. The nucleotide is shown for reference only and is not
present in the structure. b, The interface surface of Ras; the
orientation is the same as in a. The surface is coloured using a
gradient: bright orange indicates atoms <4 ? from Sos, white
indicates atoms >7 ? from Sos, lighter shades of orange indicate
intermediate distances. Sos (N-domain deleted) is shown as a
green ribbon. c, The primary sequence of Ras.
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