Algorithms|Bacillus subtilis|Base Composition|Computer Graphics|Conserved Sequence|DNA, Bacterial|Databases, Nucleic Acid|Escherichia coli|Evolution, Molecular|Helicobacter pylori|Polymorphism, Genetic|Repetitive Sequences, Nucleic Acid|Reproducibility of Results|Salmonella enterica|Sequence Alignment|Sequence Analysis, DNA|Software