title: Restriction and modification of DNA: enzymes and substrates. Introductory remarks.
mesh_terms: D001665:Binding Sites; D004269:DNA, Bacterial / Q000378:metabolism*; D004279:DNA, Viral / Q000378:metabolism*; D003851:Deoxyribonucleases / Q000378:metabolism; D004720:Endonucleases / Q000378:metabolism*; D004926:Escherichia coli / Q000201:enzymology*; D006190:Haemophilus / Q000201:enzymology*; D008780:Methyltransferases / Q000378:metabolism*; D009690:Nucleic Acid Conformation; D013329:Structure-Activity Relationship
chemical_list: D004269:DNA, Bacterial; D004279:DNA, Viral; D008780:Methyltransferases; D003851:Deoxyribonucleases; D004720:Endonucleases