The deoxyribonucleic acid modification enzyme of bacteriophage P1. Subunit structure

Deoxyribonucleic acid repair in bacteriophage.

Change in methylation of Salmonella bacteriophage P3 deoxyribonucleic acid with host-controlled modification by Escherichia coli.

Modification of bacteriophage P3 by passage through Escherichia coli K was correlated with a 54% decrease in the content of 6-methylaminopurine in the phage deoxyribonucleic acid.

Separation of T-even bacteriophage deoxyribonucleic acid from host deoxyribonucleic acid by hydroxyapatite chromatography.

A simple and rapid method is described for separation of T-even bacteriophage deoxyribonucleic acid (DNA) from host (Escherichia coli) DNA by hydroxyapatite column chromatography with a shallow gradient of phosphate buffer at neutral pH. By this method, bacteriophage T2, T4, and T6 DNA (but not T5, T7, or lambda DNA) could be separated from host E. coli DNA. It was found that glucosylation of t...

Equal incorporation of both parental bacteriophage T7 deoxyribonucleic acid strands into intracellular concatemeric deoxyribonucleic acid.

After infection of Escherichia coli B with radiolabeled T7 bacteriophage, the parental deoxyribonucleic acid label was found in both polynucleotide chains of the intracellular T7 concatemer.

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

The modification methylase of Escherichia coli B has been purified to apparent homogeneity. The enzyme can exist in several forms, each possess;ng two nonidentical polypeptides, /3 and y, of molecular weights of 60,000 and 55,000, respectively. Freshly isolated enzyme has the structure plyI, but upon storage at neutral pH and low salt, it disproportionates, producing another form, fl3~1. Treatm...