title: Host-controlled modification and restriction of bacteriophage T7 by escherichia coli B.
abstract: T7 phage resists Escherichia coli B host-controlled modification and restriction in vivo, but its DNA carries roughly five sites which are susceptible to the purified enzymes.
mesh_terms: D002499:Centrifugation, Density Gradient; D003090:Coliphages / Q000254:growth & development; D004267:DNA Viruses / Q000254:growth & development; D004270:DNA, Circular; D004279:DNA, Viral / Q000378:metabolism; D004720:Endonucleases / Q000378:metabolism; D004798:Enzymes / Q000378:metabolism; D004926:Escherichia coli / Q000201:enzymology; D005815:Genetic Code; D008242:Lysogeny; D008715:Methionine / Q000378:metabolism; D008745:Methylation; D008970:Molecular Weight; D014316:Tritium
chemical_list: D004270:DNA, Circular; D004279:DNA, Viral; D004798:Enzymes; D014316:Tritium; D008715:Methionine; D004720:Endonucleases