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Latest DNA structure Stories

A Novel Double-Stranded DNA Structure Identified
2012-08-03 13:06:37

Researchers' findings address a scientific debate that had lasted for 16 years over the existence of a double-stranded DNA structure Double-stranded DNA has often been described as a right-handed helical structure, known as B-DNA. To perform its multiple functions, double-stranded DNA has multiple structures depending on conditions. For example, the melted DNA bubble forms during transcription elongation and the left-handed helical Z-DNA forms hypothetically during transcriptional...

A Needle In A Haystack: How Does A Broken DNA Molecule Get Repaired?
2012-05-03 12:56:22

Scientists from the Kavli Institute of Nanoscience at Delft University of Technology have discovered a key element in the mechanism of DNA repair. When the DNA double helix breaks, the broken end goes searching for the similar sequence and uses that as a template for repair. Using a smart new dual-molecule technique, the Delft group has now found out how the DNA molecule is able to perform this search and recognition process in such an efficient way. This week, the researchers report their...

2009-12-04 01:06:53

Researchers show how proteins slide along DNA to carry out vital biological processes A team of scientists from the U.S. Department of Energy's (DOE) Brookhaven National Laboratory, Harvard University, and the Indian Institute of Science has made a major step in understanding how molecules locate the genetic information in DNA that is necessary to carry out important biological processes. The research, published in the December 1, 2009 edition of Nature Structural & Molecular Biology,...

2009-08-16 17:47:39

A new discovery may make it easier for scientists to manipulate DNA in the laboratory, a paper from the University of Illinois at Urbana Champagne said. Three scientists at the university discovered catalytic DNA known as deoxyribozymes that can cleave DNA strands to become catalysts for research. The scientists, chemistry Professor Scott Silverman, postdoctoral research associate Madhavaiah Chandra and graduate student Amit Sachdeva were searching for artificial sequences of DNA to cleave...

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2009-04-16 08:00:04

Physicists at Brown University have developed a novel procedure to map a person's genome. They report in the journal Nanotechnology the first experiment to move a DNA chain through a nanopore using magnets. The approach is promising because it allows multiple segments of a DNA strand to be read simultaneously and accurately. Since the human genome was sequenced six years ago, the cost of producing a high-quality genome sequence has dropped precipitously. More recently, the National Institutes...

2008-08-22 03:00:15

By Knee, Kelly M Dixit, Surjit B; Aitken, Colin Echeverria; Ponomarev, Sergei; Beveridge, D L; Mukerji, Ishita ABSTRACT The A-to-B form transition has been examined in three DNA duplexes, d(CGCGAATTCGCG)^sub 2^, d(CGCGAATTGCGC), and d(CGCAAATTTCGC), using circular dichroism spectroscopy, ultraviolet resonance Raman (UVRR) spectroscopy, and molecular dynamics (MD) simulation. Circular dichroism spectra confirm that these molecules adopt the A form under conditions of reduced water activity....


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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