The deoxyribonucleic acid modification and restriction enzymes of Escherichia coli B. I. Purification, subunit structure, and catalytic properties of the modification methylase.

Adenosine Centrifugation, Density Gradient Chromatography, DEAE-Cellulose Coliphages DNA DNA, Bacterial DNA, Viral Drug Stability Electrophoresis, Disc Escherichia coli/enzymology Ethionine Homocysteine Hydrogen-Ion Concentration Macromolecular Substances Methyltransferases/antagonists & inhibitors,isolation & purification Molecular Weight Osmolar Concentration S-Adenosylmethionine Sodium Dodecyl Sulfate Species Specificity Sulfides Tritium

DNA, Bacterial DNA, Viral Macromolecular Substances Sulfides Homocysteine Tritium Sodium Dodecyl Sulfate S-Adenosylmethionine DNA Methyltransferases Adenosine Ethionine