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This photo is licensed under a Creative Commons license. Please credit Rob Larsen with a link to Drunkenfist.com, if you use this photo anywhere. Thanks.
Like a watch wrapped around a wrist, a special enzyme encircles the double helix to repair a broken strand of DNA. Without molecules that can mend such breaks, cells can malfunction, die, or become cancerous.
See also Image 2330 at images.nigms.nih.gov/index.cfm?event=viewDetail&image...
Courtesy of Tom Ellenberger, Washington University School of Medicine in St. Louis, and Dave Gohara, Saint Louis University School of Medicine
This image is not owned by the NIH. It is shared with the public under license. If you have a question about using or reproducing this image, please contact the creator listed in the credits. All rights to the work remain with the original creator.
NIH funding from: National Institute of General Medical Sciences (NIGMS)
The Genetic Ancestry analysis (DNA test results) that you get from a DNA Testing organization can be tough to recognize. website: beyonddna.net/
the double helix stairwell at The Garvan Institute...
Well it is sorta single helix, unless you count the two handrails... ?
Love it though!
Quando dico: "non ci posso far niente, è nel mio dna" intendo che, pur riconoscendo di averlo, non voglio sforzarmi per correggere un mio difetto.
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms. The main role of DNA molecules is the long-term storage of information. DNA is often compared to a set of blueprints, since it contains the instructions needed to construct other components of cells, such as proteins and RNA molecules. The DNA segments that carry this genetic information are called genes, but other DNA sequences have structural purposes, or are involved in regulating the use of this genetic information.
Chemically, DNA is a long polymer of simple units called nucleotides, with a backbone made of sugars and phosphate groups joined by ester bonds. Attached to each sugar is one of four types of molecules called bases. It is the sequence of these four bases along the backbone that encodes information. This information is read using the genetic code, which specifies the sequence of the amino acids within proteins. The code is read by copying stretches of DNA into the related nucleic acid RNA, in a process called transcription.
Within cells, DNA is organized into structures called chromosomes. These chromosomes are duplicated before cells divide, in a process called DNA replication. Eukaryotic organisms such as animals, plants, and fungi store their DNA inside the cell nucleus, while in prokaryotes such as bacteria it is found in the cell's cytoplasm. Within the chromosomes, chromatin proteins such as histones compact and organize DNA. These compact structures guide the interactions between DNA and other proteins, helping control which parts of the DNA are transcribed.
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Desoxyribonucleïnezuur of DNA is de belangrijkste drager van erfelijke informatie in alle bekende organismen.
Een DNA-molecuul bestaat uit twee lange strengen van nucleotiden, die samen zich buigen tot een dubbele helix. De twee strengen zijn aan elkaar verbonden zijn door zogenaamde baseparen. Een basepaar verbindt twee tegenover elkaar liggende nucleotiden. De volgorde van nucleotiden in een streng wordt een sequentie genoemd. Omdat er in principe oneindig veel sequenties mogelijk zijn, kan de volgorde van nucleotiden unieke erfelijke informatie verschaffen.
In organismen bevindt het DNA zich binnen de cel in de vorm van chromosomen. Chromosomen kunnen miljoenen basenparen bevatten. Door middel van de replicatie wordt het DNA in een chromosoom gekopieerd. De replicatie gaat vooraf aan de celdeling. Zodoende krijgt elke cel een kopie van het DNA, en kan via de voortplanting het DNA doorgegeven worden aan het nageslacht. Hierbij treedt genetische variatie op, wat leidt tot evolutie.
Op een chromosoom bevinden zich tientallen tot honderden genen. Genen bestaan uit een of meer DNA-sequenties, en ieder gen kan coderen voor één of meer eiwitten. Eiwitten vervullen binnen en buiten de cel een zeer grote verscheidenheid aan biologische functies.
Aan de hand van de genetische code kan de DNA-sequentie van een gen vertaald worden in de aminozuursequentie van een eiwit. Dit proces wordt eiwitexpressie genoemd. Bij de transcriptie wordt het DNA van een gen eerst gekopieerd naar mRNA, en het mRNA wordt vervolgens bij de translatie vertaald naar een eiwit.
Bij de meeste organismen vormen de genen maar een klein gedeelte van de totale hoeveelheid DNA. Veel andere gedeelten van de chromosomen zijn betrokken bij de regulatie van de eiwitexpressie. De functie van het overige DNA is veelal niet bekend.
bron: Wikipedia
It’s one thing to detect sites in the genome associated with mental disorders; it’s quite another to discover the biological mechanisms by which these changes in DNA work in the human brain to boost risk. In their first concerted effort to tackle the latter, 15 collaborating research teams of the National Institutes of Health-funded PsychENCODE Consortium leveraged statistical power gained from a large sample of about 2000 postmortem human brains.
Read more: www.nih.gov/news-events/news-releases/2000-human-brains-y...
Credit: Vaccarino Lab, Yale University
Research published in: (Amiri et al., Transcriptome and epigenome landscape of human cortical development modeled in organoids. Science 362,2018)
NIH support from: National Institute of Mental Health (NIMH)
Photo manipulation of the same image used in "Cart". This is a DNA molecule composed of pieces of the shopping cart.
Athletes were chatting before getting their position at front of DNA ( De Nationale Assembleee / The National Assemble of Suriname ) in Paramaribo, Suriname / South America Saturday 22nd of November 2008.
There was traditional Srefidensi Marathon in Paramaribo during 33rd anniversary of Srefidensi in 2008. Powerful tropical rain just finished before the marathon started and made all surround wet.
Captured as you saw it but I thought it can be more effective if I turned it 180 degree
Ertugrul Kilic - Copyright © 2015 - All rights are reserved.
During the recent Sydney mardi gras there was an exhibition of big glossy pin-ups from past DNA issues, which included some shots by G*Squared. The photo fourth along in this picture was taken by him and is sitting on his flickr page - www.flickr.com/photos/whipflash/3976751664/in/set-299690/
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living organisms.
This model is from the Oxford University Science Museum.