DNA Helicases/chemistry; Deoxyribonucleases/chemistry; Exodeoxyribonucleases/chemistry; Bacillus subtilis/genetics; Bacillus subtilis/metabolism; Bacterial Proteins/chemistry; Bacterial Proteins/genetics; Bacterial Proteins/metabolism; Binding Sites; DNA Breaks, Double-Stranded; DNA Helicases/genetics; DNA Helicases/metabolism; DNA Repair; DNA, Bacterial/chemistry; DNA, Bacterial/genetics; DNA, Bacterial/metabolism; DNA, Single-Stranded/genetics; DNA-Binding Proteins/chemistry; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Deoxyribonucleases/genetics; Deoxyribonucleases/metabolism; Exodeoxyribonuclease V/chemistry; Exodeoxyribonuclease V/genetics; Exodeoxyribonuclease V/metabolism; Exodeoxyribonucleases/genetics; Exodeoxyribonucleases/metabolism; Homologous Recombination; Models, Molecular; Mutation; Protein Binding; Protein Structure, Tertiary