Mice, KnockoutPhenotypeAllelesGene Knockout TechniquesGenotypeMice, Inbred C57BLMutationGene FrequencyPolymorphism, GeneticMolecular Sequence DataBase SequenceHeterozygotePolymorphism, Single NucleotideGenetic Predisposition to DiseaseHomozygoteGenetic VariationCrosses, GeneticHaplotypesPolymerase Chain ReactionCells, CulturedGene DeletionMice, TransgenicAmino Acid SequenceModels, GeneticSignal TransductionDisease Models, AnimalGene TargetingReactive Oxygen SpeciesChromosome MappingSequence Analysis, DNADNA PrimersGenetic MarkersRNA, MessengerCell Line