Mice, KnockoutPhenotypeMice, Inbred C57BLMice, Mutant StrainsMutationMice, TransgenicBehavior, AnimalCells, CulturedBase SequenceMolecular Sequence DataCell DifferentiationGene Knockout TechniquesMice, Inbred StrainsSpleenMice, Inbred BALB CDisease Models, AnimalMice, Inbred CBAMice, Inbred C3HLiver