ras Guanine Nucleotide Exchange FactorsSon of Sevenless ProteinsNucleotidesAdenosine DiphosphateGuanosine DiphosphateGuanosine Triphosphateras-GRF1Adenine NucleotidesGuanine NucleotidesAdenosine TriphosphateGuanine Nucleotide Exchange FactorsProtein BindingBinding Sitesras ProteinsGRB2 Adaptor ProteinKineticsMolecular Sequence DataAmino Acid MotifsGenes, rasAmino Acid SequenceProton-Translocating ATPasesAdenylyl ImidodiphosphateModels, MolecularProtein Structure, TertiaryProtein ConformationCrystallography, X-RayMagnesiumHydrolysisAdenosine TriphosphatasesProto-Oncogene Proteins p21(ras)Escherichia coliBase SequenceActinsRabbitsOncogene Protein p21(ras)Spectrometry, FluorescenceCatalysisCloning, MolecularMutationCattlePhosphatesProtein Structure, SecondaryPolymorphism, Single NucleotideSequence Homology, Amino AcidMacromolecular SubstancesDNAThermodynamicsMusclesNucleotide MotifsCell LineNucleic Acid Conformationras GTPase-Activating ProteinsPurine NucleotidesSequence AlignmentTranscription, GeneticSequence Analysis, DNARecombinant ProteinsSequence Homology, Nucleic AcidDNA-Binding ProteinsDeuterium Exchange MeasurementPromoter Regions, GeneticMutagenesis, Site-DirectedBacterial ProteinsConserved SequencePulmonary Gas ExchangeRecombinant Fusion ProteinsCarrier ProteinsSignal TransductionTranscription FactorsRNA, MessengerSubstrate SpecificityPhylogenyExchange Transfusion, Whole BloodProteinsDNA PrimersTransfectionSister Chromatid ExchangeStructure-Activity RelationshipPlasmidsNucleotides, CyclicSaccharomyces cerevisiaePyrimidine NucleotidesMolecular WeightRestriction MappingModels, BiologicalElectrophoresis, Polyacrylamide GelCells, CulturedPolymerase Chain ReactionGenes, BacterialMembrane ProteinsMagnetic Resonance SpectroscopyRho Guanine Nucleotide Exchange FactorsBinding, CompetitiveHeLa CellsRNAPhosphorylationGene Expression RegulationPeptidesDNA, BacterialSpecies Specificity