Schlichting, I., John, J., Frech, M., Chardin, P., Wittinghofer, A., Zimmermann, H., et al. (1990). PROTON NMR-STUDIES OF TRANSFORMING AND NONTRANSFORMING H-RAS P21 MUTANTS. BIOCHEMISTRY, 29(2), 504-511. doi:10.1021/bi00454a026.