AgglutininsGenes, HomeoboxHomeodomain ProteinsGene Expression Regulation, DevelopmentalTranscription FactorsMolecular Sequence DataOtx Transcription FactorsLIM-Homeodomain ProteinsIn Situ HybridizationBase SequenceAmino Acid SequenceMSX1 Transcription FactorAntennapedia Homeodomain ProteinGoosecoid ProteinAvian ProteinsBody Patterning