ChemotaxisChemotaxis, LeukocyteSperm MotilityGastrointestinal MotilityCell MovementChemotactic FactorsFlagellaNeutrophilsDictyosteliumBacterial ProteinsSpermatozoaSignal TransductionMovementN-Formylmethionine Leucyl-PhenylalaninePseudopodiaEsophageal Motility DisordersCell AdhesionChemokine CXCL12Chemokines, CXCCells, CulturedMembrane ProteinsComplement C5aReceptors, Formyl PeptideBacterial Physiological PhenomenaMutationEscherichia coliMolecular Sequence DataReceptors, ChemokineMicroscopy, VideoModels, BiologicalCell Migration InhibitionCytoskeletonLocomotionReceptors, Interleukin-8BCell PolarityMyxococcus xanthusPhosphorylationSperm TailAmino Acid SequenceReceptors, Interleukin-8AReceptors, CXCR4Semen PreservationMonocytesInterleukin-8Cell LineGene Expression Regulation, Bacterialrac GTP-Binding ProteinsChemoreceptor CellsPhosphatidylinositol 3-KinasesManometrySperm CountMolecular Motor ProteinsSemenFlagellinGastric EmptyingCell Line, TumorChemokines, CCrac1 GTP-Binding ProteinReceptors, Amino AcidCell Surface ExtensionsChemokinesMicrofilament ProteinsCalciumProtein BindingDose-Response Relationship, DrugCyclic AMPLeukotriene B4PeristalsisChemokine CCL2ActinsGenes, BacterialNeoplasm InvasivenessMicroscopy, FluorescenceMethylationTime FactorsCell MembraneActin CytoskeletonChemokine CCL19N-Formylmethioninerho GTP-Binding ProteinsSpirochaetaMyoelectric Complex, MigratingReceptors, Autocrine Motility FactorEnzyme ActivationPhagocytosisCell ShapeReceptors, CCR2Cell Migration AssaysReceptors, Cell SurfaceMice, Inbred C57BLProtozoan ProteinsKineticsGastrointestinal Transitcdc42 GTP-Binding ProteinFibronectinsMice, KnockoutProtein Structure, TertiarySalmonella typhimuriumMicrotubulesReceptors, CCR1