DNA modification and restriction.
D003090:Coliphages; D004247:DNA; D004269:DNA, Bacterial; D004279:DNA, Viral; D004926:Escherichia coli; D005796:Genes; D005838:Genotype; D008745:Methylation; D008954:Models, Biological; D010641:Phenotype; D013045:Species Specificity
D004269:DNA, Bacterial; D004279:DNA, Viral; D004247:DNA