Incomplete Bacteriophage-like Particles in Ultraviolet-irradiated Haemophilus

Incomplete bacteriophage-like particles in ultraviolet-irradiated haemophilus.

Incomplete phagelike particles were found in competent and incompetent cells of Haemophilus influenzae Rd (transformable) lysed after exposure to ultraviolet radiation.

Transduction by ultraviolet-irradiated virulent bacteriophage.

Repair of ultraviolet-irradiated transforming deoxyribonucleic acid in Haemophilus influenzae.

Ultraviolet-sensitive and wild-type Haemophilus influenzae cells were exposed to irradiated and unirradiated transforming deoxyribonucleic acid (DNA) containing a marker which can be linked to another marker in the cells. Lysates were made after various times of incubation and assayed for transforming activity on an excisionless recipient. Repair can be noted as an increase in activity from the...

Isologous Interference with Ultraviolet and X-ray Irradiated Bacteriophage T2.

Levy, Stuart B. (Institut du Radium, Paris, France). Isologous interference with ultraviolet and X-ray irradiated bacteriophage T(2). J. Bacteriol. 87:1330-1338. 1964.-Qualitative and quantitative analysis of the interference capacity of an irradiated T(2) bacteriophage was made with ultraviolet and X-ray irradiation. Two different effects were found to explain the total interference picture in...

Action of bacteriophage T4 ultraviolet endonuclease on duplex DNA containing one ultraviolet-irradiated strand.

Previous studies have indicated that the ultraviolet endonuclease of bacteriophage T4 acts specifically at pyrimidine dimer sites in ultraviolet-irradiated DNA. At such sites the enzyme could conceivably catalyze endonucleolytic incision of the DNA either on the dimer-containing strand or on the strand directly opposite to the dimer. In the present work, a direct test of these alternatives was ...