Neuropilin-1NeuropilinsSemaphorin-3ASemaphorinsTrochlear NerveTectum MesencephaliNerve Tissue ProteinsVascular Endothelial Growth Factor AAxonsVascular Endothelial Growth Factor Receptor-2Vascular Endothelial Growth Factor Receptor-1RhombencephalonGene Expression Regulation, DevelopmentalSuperior ColliculiMice, Mutant StrainsNeovascularization, PhysiologicNeural CrestNerve Growth FactorsNeovascularization, PathologicGanglia, SpinalReceptors, Vascular Endothelial Growth FactorChick EmbryoCell MovementMembrane ProteinsSignal TransductionMesencephalonReceptors, Cell SurfaceIn Situ HybridizationOptic NerveCOS CellsGlycoproteinsMice, KnockoutLigandsRNA, MessengerReverse Transcriptase Polymerase Chain ReactionMolecular Sequence DataImmunohistochemistryMice, Inbred C57BLNeuronsMice, TransgenicXenopus laevisAmino Acid SequenceProtein BindingChickensStem CellsCells, CulturedSequence Homology, Amino AcidGene ExpressionDNA, Complementary