title: Electron microscopic studies of the mechanism of action of the restriction endonuclease of Escherichia coli B.
mesh_terms: D001483:Base Sequence; D004262:DNA Restriction Enzymes; D004269:DNA, Bacterial; D004270:DNA, Circular; D004926:Escherichia coli / Q000201:enzymology*; D008854:Microscopy, Electron; D009690:Nucleic Acid Conformation; D013329:Structure-Activity Relationship
chemical_list: D004269:DNA, Bacterial; D004270:DNA, Circular; D004262:DNA Restriction Enzymes