1. Khan MN, Findlay JWA (eds) (2009) Ligand-binding assays: development, validation, and implementation in the drug arena. Wiley, Hoboken, NJ
2. Kopra K (2015) From unspecific quenching to specific signaling: functional GTPase assays utilizing quenching resonance energy transfer (QRET) technology. University of Turku, Turku
3. Eberth A, Ahmadian MR (2009) In vitro GEF and GAP assays. Curr Protoc Cell Biol 14:Unit 14.9
4. Wennerberg K, Rossman KL, Der CJ (2005) The Ras superfamily at a glance. J Cell Sci 118:843–846
5. Cherfils J, Zeghouf M (2013) Regulation of small GTPases by GEFs, GAPs, and GDIs. Physiol Rev 93:269–309