PseudopodiaDictyosteliumChemotaxisActinsCell MovementAmoebaMicroscopy, Electron, ScanningMicroscopy, VideoMicroscopy, Electroncdc42 GTP-Binding ProteinAnnexin A2PhagocytosisLasers, Excimerrho GTP-Binding ProteinsCell SizeCell AdhesionMicroscopy, Phase-ContrastCell PolarityChemotactic FactorsProto-Oncogene Proteins c-crkCytoskeletonAstrocytomarac1 GTP-Binding ProteinMicroscopy, FluorescenceNeoplasm InvasivenessExtracellular MatrixLysophospholipidsrac GTP-Binding ProteinsSerumCell MembraneMicroscopy, ConfocalMovementCell Line, TumorCytoskeletal ProteinsHepatocyte Growth FactorMacrophagesCytoplasmElectrophoresis, Gel, Two-DimensionalModels, BiologicalCollagenSpectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization3T3 CellsCells, CulturedCercopithecus aethiopsCell LineImmunoblottingFibroblastsCOS CellsSignal TransductionEnzyme InhibitorsTransfection