Structure 17

Supplemental Data

Differences in Flexibility Underlie Functional

Differences in the Ras Activators Son of Sevenless

and Ras Guanine Nucleotide Releasing Factor 1 Tanya S. Freedman, Holger Sondermann, Olga Kuchment, Gregory D. Friedland, Tanja Kortemme, and John Kuriyan