A protein which binds to either single-stranded or double-stranded deoxyribonucleic acid (DNA) but not to ribonucleic acid has been isolated by osmotic shock treatment of growing cells. This periplasmic protein differs from the principal intracellular binding protein in its greater thermolability and by the absence of salt-induced cooperativity in its interaction with single-stranded DNA. Certa...

The progeny cells of Escherichia coli strain P678-54, which normally do not contain deoxyribonucleic acid (DNA), were found to carry DNA when the parental cell carried colicin factor E1 (Col E1). The DNA found in the normally DNA-less segregants was shown to be Col E1 DNA, which is present primarily as a covalently closed circular molecule that can undergo more than one complete cycle of replic...

Miracil D preferentially inhibited the growth of a deoxyribonucleic acid (DNA) polymerase-deficient Escherichia coli strain. This is taken to indicate that miracil D is capable of altering the DNA of living cells and that it may thereby be a potential mutagen and carcinogen.

Large amounts of a heat-inducible phage lambda mutant (lambdaCI857) may be obtained under standardized conditions. The phage is harvested by simple polyethylene glycol (C 6000) precipitation and purified by CsCl density gradient banding. Deoxyribonucleic acid (DNA) is extracted by cold phenol and purified by sucrose density gradient sedimentation to yield a homogenous population of unbroken lam...

In this paper, we use improved Z-scan and I-scan methods to analyze the refractive optical nonlinearities of the deoxyribonucleic acid (DNA) samples, which occur with continuous wave and femtosecond pulsed lasers and our proposed solutions to further improve both the methods and the nonlinear optical properties of DNA.

Elder, Robert L. (Johns Hopkins University, Baltimore, Md.), and Roland F. Beers, Jr. Nonphotoreactivating repair of ultraviolet light-damaged transforming deoxyribonucleic acid by Micrococcus lysodeikticus extracts. J. Bacteriol. 90:681-686. 1965.-Extracts from Micrococcus lysodeikticus repair Haemophilus influenzae transforming deoxyribonucleic acid (DNA) damaged by ultraviolet light radiatio...

Even though the addition of silver sulfadiazine (AgSu) to purified deoxyribonucleic acid (DNA) results in the formation of AgSu-DNA complexes, no such complexes were detected in bacteria treated with AgSu. AgSu blocked macromolecular syntheses in treated bacteria, DNA synthesis being slightly more sensitive to this inhibitory action. The ribosomes, ribonucleic acid, and DNA isolated from treate...

Exposure of Escherichia coli to critical acridine orange (AO) concentrations did not result in loss of viability. However, the deoxyribonucleic acid (DNA) of cells exposed to such agents was rapidly degraded and repolymerized. On the other hand, a bacterium deficient in DNA repair (pol A(1) (-), lacking DNA polymerase) was sensitive to the action of AO. The DNA of such cells was also degraded b...

Nowadays, increased information capacity and transmission processes make security a difficult problem. As result, most researchers employ encryption decryption algorithms to enhance domains. it progresses, new methods are being used for security. In this paper, hybrid algorithm that combines the honey an advanced DNA encoding scheme in key generation is presented. Deoxyribonucleic Acid (DNA) ac...

Preparatory procedures and high resolution shadowing of deoxyribonucleic acid (DNA) molecules for electron microscopy are described. They involve a two-stage mounting of the DNA on cytochrome c monolayers and shadowing with tantalum-tungsten. Conditions are determined that produce a smooth substrate and reproducible binding of the DNA strands in a randomly coiled manner without obvious stretchi...