LampreysPetromyzonHagfishesCell MovementAnimal MigrationCell Migration InhibitionForeign-Body MigrationPhysiology, ComparativeFishesSpinal CordSwimmingVertebratesReticular FormationCell AdhesionCell Migration AssaysLocomotionPyrrolidonecarboxylic AcidCells, CulturedChordata, NonvertebrateMacrophage Migration-Inhibitory FactorsSignal TransductionChemotaxisPhylogeny