Navigation Links
When every photon counts
Date:4/20/2009

This release is available in German.

The eyes of nocturnal mammals contain particularly large numbers of the highly light-sensitive rods, the photoreceptor type used for night vision. This allows the detection of light levels millions of times lower than daylight. Researchers at the Ludwig Maximilians University Munich, the Max Planck Institute for Brain Research Frankfurt and the Cavendish Laboratory Cambridge have now shown that the nocturnal lifestyle and its visual challenges had a unique impact on rod nuclear organisation: The distributions of the densely packed inactive and the less densely packed active regions of DNA differ remarkably from those in other somatic cells of nearly all organisms from protozoans to multicellular animals, including the rods of diurnal mammals. With this unique arrangement, the rod nuclei of nocturnal mammals act as micro-lenses that focus the incoming light. Computer simulations show that stacks of such nuclei effectively guide the light to the light-sensitive outer segments of the rods. Hence, this change in rod nuclear organisation improves vision at nocturnal low light levels. It also provides new insights into the evolution of the mammalian retina and furthers our understanding of the nuclear architecture in general. (Cell, April 17th, 2009)

The DNA of a mammalian cell is about two metres long if all base pairs were aligned in one string. To fit this genetic material in a nucleus of only a few microns diameter, the DNA is wrapped around millions of so-called histon proteins that are arranged like pearls on a string, leading to a 10,000-fold compaction of the DNA. This DNA-protein complex is termed chromatin. Chromatin regions with genetic information that needs to be read out and transcribed by enzymes in a given cell at a given time are less tightly packed and more easily accessible. These chromatin pa
'/>"/>

Contact: Dr. Leo Peichl
peichl@mpih-frankfurt.mpg.de
49-699-676-9348
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Best way to treat malaria: Avoid using same drug for everyone, scientists say
2. MSU biofilms research helps set standards for everyday products
3. Tracking influenzas every movement
4. Everythings coming up corals
5. Not just for the monkeys: New publication shows evolution is everywhere
6. 1 person out of every 1,000 has synaesthesia, in which an individual can smell a sound
7. Photonic crystal biosensors detect protein-DNA interactions
8. The photonic beetle
9. Research at Argonnes Advanced Photon Source reveals structure and behavior of collagen
10. Ecologists say metabolism accounts for why natural selection favors only some species
11. Eltrombopag effective for hepatitis C patients with low blood-platelet counts
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
When every photon counts
(Date:2/5/2015)... PARK, North Carolina , 5. Februar ... 35. Jahr als spezialisiertes Logistikunternehmen und hat ... als einzige klinische Logistikfirma (Clinical Logistics Organization ... Kernbotschaft der neuen Kampagne lautet First ... Lieferungen. Foto: http://photos.prnewswire.com/prnh/20150205/173753 ...
(Date:2/5/2015)... Jan. 26, 2015   Epic Sciences , a precision ... announced that Murali Prahalad , Ph.D., president and CEO, ... Conference (PMWC) 2015: Silicon Valley, which is taking place ... Calif. on January 26-28, 2015. ... Age as Biomarkers." Last year, Epic Sciences was a finalist ...
(Date:2/5/2015)... IRVINE, Calif. , Jan. 27, 2015 ... trusted provider of globally deployed, innovative test ... today announced the delivery of its ... Martin Space Systems Company (LMSSC). GENASYS is ... the demands of mission-critical applications that require ...
Breaking Biology News(10 mins):Marken startet Kampagne mit Patienten im Mittelpunkt 2Marken startet Kampagne mit Patienten im Mittelpunkt 3Epic Sciences to Present at Personalized Medicine World Conference 2015 on the Use of Circulating Tumor Cells as Cancer Biomarkers 2Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 2Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 3Marvin Test Solutions' GENASYS Platform Advances Mission-Critical Aerospace Production Test 4
... Johns Hopkins scientists have discovered internal "shipping labels" that allow ... proteins to get to the surface of cells and stay ... are the ion channel that lets heart cells contract on ... that causes AIDS, into cells, the researchers discovered. , Because ...
... fierce dinosaur T. rex and a modern songbird such ... systems may have been more similar than scientists previously ... Harvard University. , Though some scientists have proposed that ... reptiles, a new study published in this week's issue ...
... Asia of primate-to-human transmission of simian foamy virus (SFV), a ... has not been shown to cause disease in humans. The ... took place at a monkey temple in Bali, Indonesia, the ... Infectious Diseases. Even though this particular virus jumping to humans ...
Cached Biology News:Hopkins scientists uncover 'tags' that force proteins to cell surface 2Hopkins scientists uncover 'tags' that force proteins to cell surface 3Hopkins scientists uncover 'tags' that force proteins to cell surface 4Study: Predatory dinosaurs had bird-like pulmonary system 2Study: Predatory dinosaurs had bird-like pulmonary system 3Primate virus jumps species barrier to humans for first time in Asia 2Primate virus jumps species barrier to humans for first time in Asia 3
(Date:2/27/2015)... 27, 2015 Research and Markets ( http://www.researchandmarkets.com/research/p2ddnr/global_market ... Report of Trypsin" report to their offering. , ... at providing comprehensive data on Trypsin globally and regionally ( ... North America , Latin America ... to Trypsin This report focuses on three primary ...
(Date:2/27/2015)... (PRWEB) February 27, 2015 FamilyFarms Group ... General Manager of State Line Farms, received the 2015 ... a producer, under the age of 35, who has ... is an honor to win the Tomorrow's Top Producer ... who won the Top Producer Award and learning from ...
(Date:2/26/2015)... 26, 2015 On behalf of biotech client ... Wilentz, Goldman & Spitzer, P.A. (Wilentz) secured a ... Genewiz Inc. in excess of $10 million. The jury ... secrets, and that it improperly hired one or more ... motions for judgment notwithstanding the verdict, a new trial, ...
(Date:2/26/2015)... 26, 2015 Protiviti ( www.protiviti.com ), a ... the Governance Portal , designed to increase the ... (GRC) tasks across multiple business units and projects. The ... customers better align their controls with the COSO ( ... requirements. In response to client feedback, Protiviti has also ...
Breaking Biology Technology:Global Market Report of Trypsin 2014-2018 2Matt Sims Receives the 2015 Tomorrow’s Top Producer Horizon Award 2Wilentz Client GenScript Awarded $10 Million in Trade Secrets Case Against Genewiz 2Wilentz Client GenScript Awarded $10 Million in Trade Secrets Case Against Genewiz 3Protiviti Governance Portal Helps Companies Drive Governance, Risk and Compliance Productivity Across Multiple Business Units 2Protiviti Governance Portal Helps Companies Drive Governance, Risk and Compliance Productivity Across Multiple Business Units 3
... Inc. (Nasdaq: RDEA ) today announced that ... study of BAY 86-9766 in advanced cancer patients will ... 2011 American Society of Clinical Oncology (ASCO) Annual Meeting ... Presentation details are as follows:Presentation Title: , ...
... VRML ), a molecular diagnostics company, today announced ...  Mr. Huebner currently serves as Managing Director at LynxCom Partners, ... Huebner has over 35 years of experience in the diagnostic ... in a number of clinical diagnostic companies including Hybritech, Inc., ...
... NEW YORK, May 19, 2011 Reportlinker.com ... is available in its catalogue: ... http://www.reportlinker.com/p0459203/Global-Biosimilars-Industry.html?utm_source=prnewswire&utm_medium=pr&utm_campaign=Biopharmaceutical This report ... US$ Million. The report provides separate comprehensive ...
Cached Biology Technology:Ardea Biosciences Announces Data on MEK Inhibitor BAY 86-9766 (RDEA119) to be Presented at 2011 American Society of Clinical Oncology Annual Meeting 2Ardea Biosciences Announces Data on MEK Inhibitor BAY 86-9766 (RDEA119) to be Presented at 2011 American Society of Clinical Oncology Annual Meeting 3Vermillion Announces the Appointment of Bruce Huebner to its Board of Directors 2Vermillion Announces the Appointment of Bruce Huebner to its Board of Directors 3Vermillion Announces the Appointment of Bruce Huebner to its Board of Directors 4Global Biosimilars Industry 2Global Biosimilars Industry 3Global Biosimilars Industry 4Global Biosimilars Industry 5Global Biosimilars Industry 6Global Biosimilars Industry 7Global Biosimilars Industry 8Global Biosimilars Industry 9Global Biosimilars Industry 10
Mouse Serpin F1/PEDF MAb (Clone 199315)...
Immunogen: Full length M32 fusion protein. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Prostaglandin E2 Luminex Standard Product Lines: Unspecified...
Eppendorf tube holder, for Tube rack 175 x 12 mm, 100. Category: Chromatography Systems & Accessories, Systems....
Biology Products: