DEOXYRIBONUCLEASE ACTIVITY IN SEMEN

Deoxyribonuclease Activity

The relationship of catalase, cystinase, and deoxyribonuclease activity to toxinogeny in Corynebacterium diphtheriae was examined. Mutants deficient in each activity were isolated after mutagenization of strain C4 with nitrosoguanidine. All mutants were converted to toxinogeny after lysogenization with beta-converting phage, thus establishing that there is no absolute link between toxin product...

Evaluation of extracellular deoxyribonuclease activity in Pseudomonas.

Streitfeld, Murray M. (University of Miami, Coral Gables, Fla.), Edward M. Hoffmann, and Herbert M. Janklow. Evaluation of extracellular deoxyribonuclease activity in Pseudomonas. J. Bacteriol. 84:77-80. 1962.-Of 23 strains of P. aeruginosa isolated from pathological processes, 22 strains, representative of at least nine different somatic antigen types, were found to elaborate extracellular deo...

Late deoxyribonuclease activity of Salmonella enteriditis.

As a result of chance observations, the authors studied for deoxyribonuclease activity 16 strains of Salmonella, including six fresh isolates and ten stock cultures, with positive results in 13. Reactions characteristically occurred at 48 hours or later, with the majority being manifest at 72 hours and the latest at six days. No other positive reaction was observed among approximately 7,000 Ent...

Deoxyribonuclease activity of micrococci from clinical sources.

Inhibition of deoxyribonuclease activity in the medium surrounding plant protoplasts.

After 1 hour, exogenous deoxyribonucleic acid was degraded within a culture medium at 25 C (pH 6) containing protoplasts of Daucus carota L. var. sativa. Low temperature incubation (1 C) or the addition of 45 millimolar sodium citrate to the medium eliminated DNase activity for at least 4.5 hours. This DNase activity was not reduced at pH 7 or 9, nor by addition of 200 millimolar adenosine 5'-t...