Latest Helices Stories

2013-04-19 17:55:22

Scientists have revealed how a bacterial enzyme has evolved an energy-efficient method to move long distances along DNA. The findings, published in Science, present further insight into the coupling of chemical and mechanical energy by a class of enzymes called helicases, a widely-distributed group of proteins, which in human cells are implicated in some cancers. The new helicase mechanism discovered in this study, led by researchers from the University of Bristol and the Technische...

2013-04-18 23:32:55

A research team from NPL and the University of Edinburgh have invented a new way to zip and unzip DNA strands using electrochemistry. The DNA double helix has been one of the most recognizable structures in science ever since it was first described by Watson and Crick almost 60 years ago (paper published in Nature in 25 April 1953). The binding and unbinding mechanism of DNA strands is vital to natural biological processes and to the polymerase chain reactions used in biotechnology to copy...

DNA Discoverer's Letter To Be Auctioned Off
2013-03-25 05:26:50

redOrbit Staff & Wire Reports - Your Universe Online A handwritten letter sent from one of the scientists responsible for discovering the structure of DNA will be auctioned off next month in New York City, according to various media reports. In the letter, which was written on March 19, 1953, British molecular biologist and biophysicist Francis Crick explains to his then-12-year-old son Michael how he and colleague James Watson were able to create a model for the genetic...

2013-03-22 09:36:46

In a new discovery that represents a major step in solving a critical design challenge, Arizona State University Professor Hao Yan has led a research team to produce a wide variety of 2-D and 3-D structures that push the boundaries of the burgeoning field of DNA nanotechnology. The field of DNA nanotechnology utilizes nature's design rules and the chemical properties of DNA to self-assemble into an increasingly complex menagerie of molecules for biomedical and electronic applications. Some...

Human Genome Found To Contain Quadruple Helix DNA Strands
2013-01-21 05:09:41

redOrbit Staff & Wire Reports - Your Universe Online On the 60th anniversary of the publication of the paper describing the double-helix structure of DNA, researchers from Cambridge University reportedly have proven the existence of four-stranded “quadruple helix” DNA structures within the human genome. It was in 1953 that James D. Watson and Francis Crick, also of Cambridge University, published a paper which described the interweaving structure of the double-stranded...

2012-10-10 10:27:08

“Molecular sled” carries viral enzyme along DNA to find and interact with targets; findings suggest mechanism may be universal Scientists at the U.S. Department of Energy´s (DOE) Brookhaven National Laboratory, with collaborators from Harvard University, the University of Madrid, Princeton University, and the University of Zurich, have discovered a new mechanism that may alter principle understandings of molecular interactions within a cell´s nucleus. The discovery...

2012-09-10 14:45:32

An international team of scientists have shown at an unprecedented level of detail how cells prioritize the repair of genes containing potentially dangerous damage. The research, published in the journal Nature and involving academics from the University of Bristol, the Institut Jacques-Monod in France and Rockefeller University in the US, studied the action of individual molecules in order to understand how cellular repair pathways are triggered. The genetic information that forms the...

Secrets Of Genetic Switch Unraveled
2012-08-31 16:46:43

When an invading bacterium or virus starts rummaging through the contents of a cell nucleus, using proteins like tiny hands to rearrange the host´s DNA strands, it can alter the host´s biological course. The invading proteins use specific binding, firmly grabbing onto particular sequences of DNA, to bend, kink and twist the DNA strands. The invaders also use non-specific binding to grasp any part of a DNA strand, but these seemingly random bonds are weak. Emory University...

Cucumber Inspires New Bio-Inspired Twistless Spring
2012-08-31 12:30:36

April Flowers for redOrbit.com - Your Universe Online Researchers at Harvard University have developed a new spring that is soft when pulled gently and stiff when pulled strongly — all from studying a cucumber. Captivated by the strange coiling behavior in the grasping tendrils of the cucumber plant, the research team found that unlike a normal coil, which would unwind to a flat ribbon under stress when untwisted, a cucumber tendril would actually coil further. Understanding this...

Latest Helices Reference Libraries

Brief Introduction To DNA Probes
2014-01-12 00:00:00

DNA probes help scientists to detect a specific gene in a long DNA sequence. According to Dr. Michael A. Pfaller, DNA probes are “single-stranded pieces of nucleic acid, labeled with a specific tracer (isotope, enzyme, or chromophore), that will hydrogen bond (hybridize) with complementary single-stranded pieces of DNA (or RNA) under the appropriate conditions of pH, temperature, and iconic strength.” The Foundation for Genomics and Population Health website has a helpful video about...

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Word of the Day
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'