dna news articles 2019
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By Associated Press , Wire Service Content Oct. 19, 2019 www.sciencedaily.com/releases/2019/10/191017131428.htm (accessed August 13, 2020).Below are relevant articles that may interest you. If the extra twist goes only to the front of the replisome, then the two daughter DNA molecules would not get tangled up, so they can separate. The Scientist's articles tagged with: DNA.
News and articles about advances in genetic sequencing, genetics and how DNA (deoxyribonucleic acid) might be used in the future. Questions?Cornell University. Wang and her team used the angular optical trap tool that her group previously developed, as well as other methods to both create and work with both single and braided chromatin fiber substrates, enabling them to examine their torsional mechanical properties.Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly.
For a brief window this month, that didn’t matter.Authorities are systematically gathering genomic data from tens of millions of people.Using DNA evidence, the district attorney’s office in Orange County, Calif., said it had identified a 1968 homicide victim as Anita Louise Piteau and the suspect as Johnny Chrisco.An extinct version of the smallpox virus dating to 1,400 years ago prompts speculation about viruses becoming more lethal over time.Scientists from the consumer genetics company 23andMe have published the largest DNA study to date of people with African ancestry in the Americas.The prospect of erasing some disabilities and perceived deficiencies hovers at the margins of what people consider ethically acceptable.Along a coastline in New Zealand, kelp seems to contain a genetic record of the planet’s geological upheaval.Almost everyone responds to the right exercise program, but the right program is not genetics-dependent.The stretch of six genes seems to increase the risk of severe illness from the coronavirus. But how those familiar strands in DNA… "Scientists unwind mystery behind DNA replication." A new perspective from Cornell physicists is helping unravel the mystery.Researchers approached the problem from a topological perspective, asking what impact the helix shape itself has on DNA replication. News about DNA, including commentary and archival articles published in The New York Times. Genetic differences can make one food that's healthy for most people, unhealthy for you, and vice versa.
But how those familiar strands in DNA's double helix manage to replicate without being tangled up has been hard to decipher. This would create a major issue for chromosome segregation during cell division, which could cause DNA damage and result in cell death or cancer.The researchers found that twisting a single chromatin fiber is much easier than twisting a double fiber. This means that the extra twist will preferentially go to the front, thus minimizing the intertwining of the two daughter DNA molecules. Creating a substrate of braided chromatin fibers had not been previously attempted, because of the complexity of the task. "Scientists unwind mystery behind DNA replication." Inovio, a Pennsylvania biotech company, has spent years claiming to be on the cusp of important vaccines. That theme also emerged from a project that used the Denisovan girl’s DNA to reconstruct her skeleton and face (SN: 10/12/19 & 10/26/19, p. 24). Scientists unwind mystery behind DNA replication.
"In a separate experiment, the researchers found that an enzyme that untangles DNA (topoisomerase II) strongly prefers the single chromatin fiber in the front. "This research highlights the importance of physical principles in fundamental biological processes," said lead author Michelle Wang, professor of physics in the College of Arts and Sciences and a Howard Hughes Medical Institute Investigator.The paper, "Synergistic Coordination of Chromatin Torsional Mechanics and Topoisomerase Activity," published Oct. 17 in During DNA replication -- as a replisome splits two DNA strands and moves forward -- the DNA must also twist around the helical axis. Latest News Headlines and Live Updates - DNA India Covers all latest and breaking news on Politics, Business, Sports, Bollywood, technology & health from India & the world at Daily News & Analysis It is not intended to provide medical or other professional advice.Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.Financial support for ScienceDaily comes from advertisements and referral programs, where indicated.
Using eukaryotes -- which comprise the vast majority of living things -- as their model system, they found that the intrinsic mechanical properties of the chromatin (a complex of DNA and proteins) determine how the chromatin fibers will entwine.This topology is crucial to the successful separation of newly replicated DNA: If the fibers twist too tightly too early, then the molecules are unable to properly segregate during cell division.
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