PseudopodiaCytoplasmDictyosteliumActinsChemotaxisCell MovementAmoebaMicroscopy, ElectronMicroscopy, Electron, ScanningMicroscopy, VideoMicroscopy, Fluorescencecdc42 GTP-Binding ProteinAnnexin A2PhagocytosisCytoskeletonMicroscopy, Phase-ContrastCell SizeCell Adhesionrho GTP-Binding ProteinsLasers, ExcimerCell PolarityChemotactic FactorsCell NucleusProto-Oncogene Proteins c-crkAstrocytomaCell Membranerac1 GTP-Binding ProteinMicroscopy, ConfocalNeoplasm InvasivenessCell LineExtracellular Matrixrac GTP-Binding ProteinsLysophospholipidsSerumModels, BiologicalCell Line, TumorCells, CulturedCytoskeletal ProteinsMovementCercopithecus aethiopsMacrophagesCOS CellsImmunoblottingElectrophoresis, Gel, Two-DimensionalTransfectionSignal Transduction3T3 CellsHepatocyte Growth FactorFibroblastsSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationCollagenActive Transport, Cell NucleusEnzyme InhibitorsMolecular Sequence DataProtein TransportAmino Acid SequenceNuclear Localization SignalsHeLa CellsKaryopherins