GastrulationEmbryo, NonmammalianDrosophilaActomyosinGastrulaNeural TubeDrosophila melanogasterMyosin Type IIMorphogenesisCell ShapeCell PolarityTooth ApexDrosophila ProteinsStrongylocentrotus purpuratusAdherens JunctionsMicrofilament ProteinsTwist Transcription FactorEphrinsrho GTP-Binding ProteinsActinsCytokinesisConstrictionrho-Associated KinasesBody PatterningMesodermVasoconstrictionXenopus laevisConstriction, PathologicSignal TransductionEpithelial CellsModels, BiologicalCell MovementArteriolesContractile ProteinsSpindle ApparatusAnaphaseDuctus ArteriosusCleavage Stage, OvumEyeCell DivisionVasoconstrictor AgentsMitosisReflex, PupillaryBlastodermMicrotubulesBronchoconstrictionSalamandridaeAmniotic Band SyndromeCompound Eye, ArthropodPupilPhotoreceptor Cells, InvertebratePotoroidaeCytoskeletonVasodilationCell Membrane StructuresGenes, InsectMuscle TonusMyosins