Sequence DeletionMolecular Sequence DataBase SequenceRecombination, GeneticChromosomes, BacterialGene DeletionChromosomesGene ConversionPlasmidsChromosome DeletionTransformation, GeneticBlotting, SouthernDNA, BacterialNucleic Acid HybridizationChromosome MappingSequence Analysis, DNARepetitive Sequences, Nucleic AcidRestriction MappingCloning, MolecularGenetic VectorsModels, GeneticDNAMutationAmino Acid SequencePhenotypeDNA Mutational AnalysisPolymerase Chain ReactionClonal DeletionExonsMice, Knockout