PhenotypeMutationMolecular Sequence DataBase SequenceGenotypeAmino Acid SequenceCells, CulturedMice, Inbred C57BLAllelesMice, KnockoutSignal TransductionCell DifferentiationRNA, MessengerModels, BiologicalTime FactorsMice, TransgenicDisease Models, AnimalCell LineChromosome MappingGene DeletionModels, GeneticPedigreeTranscription FactorsGene Expression RegulationGene ExpressionGenetic Complementation TestGenetic VariationImmunohistochemistryPhylogenyGene Expression Regulation, DevelopmentalReverse Transcriptase Polymerase Chain ReactionCrosses, GeneticMembrane ProteinsHeterozygoteGene Expression ProfilingHomozygotePolymerase Chain ReactionSequence Analysis, DNA