HOME >> BIOLOGY >> NEWS
Lights, Camera ... Reaction: Charting The Biological Effects Of Light InBillionths Of A Second

Scientists using extremely high powered X-rays and a pulsed laser have succeeded in taking the first "snapshots" of a photoactive protein molecule as it converts light energy into chemical energy, a process that takes less than one billionth of a second.

The finding, reported in today's issue of the journal Science, provides the first direct structural evidence of how light can be converted into chemical energy -- the initial stage of processes as different, and as fundamental, as photosynthesis and vision. It also may suggest a powerful new mechanism for the development of optical computers.

The ability to record this ultra-rapid conversion results from a recent, million-fold improvement in time resolution of X-ray measurements that can now record changes in the shape of the working protein that occur in billionths of a second.

The experiments, only the second of their type, were performed by an international team at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France. About one year ago, a related team reported the first nanosecond movie of the muscle protein myoglobin as it opened up to release carbon monoxide. Today's report emphasizes the wider applicability of this new type of measurement.

Keith Moffat, Ph.D., professor of biochemistry and molecular biology and director of the Consortium for Advanced Radiation Sources at the University of Chicago, who led both research teams, and colleagues from the University of Chicago, ESRF, Lund University and the E.C. Slater Institute of the University of Amsterdam, Netherlands, focused on a blue light photo-reactive protein called xanthopsin, found in the eubacterium Ectothiorhodospira halophila. These bacteria respond to the absorbtion of light by altering their swimming behavior.

This bacterium, so far found only in a few high arid lake beds in Oregon and salt depressions in the Egyptian desert, is "rather obscure," says Moffat, but this simple organism appears to be quickly
'"/>

Contact: John Easton
jeaston@mcis.bsd.uchicago.edu
773-702-6241
University of Chicago Medical Center
19-Mar-1998


Page: 1 2 3

Related biology news :

1. Charting the future in prostate cancer care: A call to action
2. Biological oceanographers examine regime shifts in complex marine ecosystems
3. Biological computer diagnoses cancer and produces drug in a test tube
4. Biological cause of one form of blindness identified by SLU researchers
5. Biological trick reveals key step in melatonins regulation
6. Journal of Gerontology: Biological Sciences to offer forum
7. Biological clock more influenced by temperature than light
8. Systematics at a Crossroads: Biological and Philosophical Arguments
9. Biological and chemical agents in terrorism examined at AAN Annual Meeting
10. Biological Challenges to Humanity: Emerging and Re-emerging Pathogens
11. Biological evidence can persuade people to change unhealthy habits

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/5/2017)...  The Allen Institute for Cell Science today announces ... portal and dynamic digital window into the human cell. ... application of deep learning to create predictive models of ... a growing suite of powerful tools. The Allen Cell ... publicly available resources created and shared by the Allen ...
(Date:4/3/2017)... , April 3, 2017  Data ... precision engineering platform, detected a statistically significant ... product prior to treatment and objective response ... the potential to predict whether cancer patients ... to treatment, as well as to improve ...
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... ... October 09, 2017 , ... ... medical journal, Epilepsia, Brain Sentinel’s SPEAC® System which uses the surface electromyography ... generalized tonic-clonic seizures (GTCS) using surface electromyography (sEMG). The prospective multicenter phase ...
(Date:10/7/2017)... (PRWEB) , ... October 06, ... ... leader in Hi-C-based genomic technologies, launched its ProxiMeta™ Hi-C metagenome deconvolution product, ... Hi-C kit and accompanying cloud-based bioinformatics software to perform Hi-C metagenome deconvolution ...
(Date:10/6/2017)... ... 06, 2017 , ... The HealthTech Venture Network (HTVN) is ... fourth annual Conference where founders, investors, innovative practitioners and collaborators are invited to ... showcasing early stage digital health and med tech companies. , This day-long event ...
(Date:10/5/2017)... ... October 05, 2017 , ... LabRoots , the ... from around the world, is giving back to cancer research with a month-long promotion ... , Now through October 31, shoppers can use promo code PinkRibbon to get 10 ...
Breaking Biology Technology:
Cached News: