HOME >> BIOLOGY >> NEWS
The Green Party

Biologists conducting Space Shuttle experiments may be one step closer to shedding light on the biggest power booster on the planet: a protein in green plants called Photosystem I.

A German research team recently presented the results of their Space Shuttle experiment designed to crystallize Photosystem I molecules. According to the researchers, "This experiment has yielded the best data set thus far obtained from Photosystem I crystals."

During photosynthesis, the cells in green plants undergo two simultaneous reactions, both of which rely on a separate kind of protein. Photosystem I protein molecules use the trapped energy in sunlight to convert carbon dioxide into carbon and oxygen. This provides the plant food in the form of carbohydrates, lipids, proteins and nucleic acids - the building blocks of life. Photosystem II protein molecules use light energy to split water into hydrogen and oxygen for plant respiration.

Scientists crystallize protein molecules in order to study their complex internal structures. Because the molecules are too small to study directly under a microscope, scientists use X-ray diffraction to get a picture of the molecule.

Shining X-rays through a crystal produces a scattering pattern, which is a type of blueprint. Think of a shadow cast through a picket fence - the shape of the shadow would tell you that the fundamental building block of the fence is a rectangular board. Shining X-rays through a protein crystal indicates the protein's shape, where it's located, and ultimately how it may work.

High quality crystals - composed of ordered and repeating units of a particular protein - are required for X-ray diffraction. Some of the crystals grown in the microgravity conditions of space are more perfectly ordered than crystals grown on Earth. Microgravity can also affect the rate at which the proteins initiate new growth. Space crystals have shown a 10 to 20-fold larger volume compared to the Earth-grown counterparts.
'"/>

Contact: John Horack
john.horack@msfc.nasa.gov
256-544-1872
NASA/Marshall Space Flight Center--Space Sciences Laboratory
10-May-1999


Page: 1 2 3 4 5

Related biology news :

1. Green, leafy spinach may soon power cellphones and laptops
2. Green tea research leads to gum and other products
3. Discovery of tiny microbes in ancient Greenland glacier may define limits for life on Earth
4. Green Foundation, Trust gives $12.8 million for UT Southwestern comprehensive research center
5. Green and sustainable chemistry
6. Startling deep-sea encounter with rare, massive Greenland shark
7. DuPont receives US EPAs Presidential Green Chemistry Award for new innovation
8. Green, black tea extracts found to lower cholesterol
9. Green tea boosts antimicrobial properties of toothpaste
10. Greenhouse gas might green up the desert
11. Green tea linked to skin cell rejuvenation

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: The Green Party

(Date:11/7/2014)... 6, 2014 Leading Biometric companies aim ... security revolutionizing online transactions.  Companies in focus today are: NXT-ID, ... BABA ), Google Inc. (NASDAQ: GOOG ... (NASDAQ: EBAY ) and MasterCard Inc. (NYSE: MA) ... NXTDW), a biometric authentication company focused on the growing mobile ...
(Date:11/6/2014)... predator. Except when that predator runs so fast that it ... size, is the fastest creature on Earth. Some of these ... about five miles per hour). The fastest human can do ... the tiger beetle, a person would have to hit 480 ... problem. At peak speeds, everything becomes a blur. They can,t ...
(Date:11/5/2014)... dedicated his career to understanding the Earth,s climate ... , As deputy director and regional climatologist for ... Research Institute, Redmond has more than three decades ... of climate data to the general public. , ... Francisco on December 15-19, 2014 the American Geophysical ...
Breaking Biology News(10 mins):Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6The tiger beetle: Too fast to see 2Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2
(Date:11/26/2014)... -- Theravalues Corporation est fier d,annoncer le lancement ... salon Hi Europe 2014 (du 2 au 4 décembre ... Curcumine la plus biodisponible actuellement sur le marché, ... ingrédients approuvés par les règlements européens. ... la racine de curcuma ( Curcuma longa ) ...
(Date:11/24/2014)... , UAE, November 24, 2014 ... "Sheikh Hamdan Bin Rashid Al Maktoum Awards for Medical ... Dubai, United Arab Emirates , on ... ) , The Carter Center which ... Services is actively involved in numerous programs that aim ...
(Date:11/24/2014)... 2014 One of the most extensive, widely ... photonics is now available to high school and junior college ... SPIE, the international society for optics and photonics , announced ... SPIE Digital Library available to high schools for free ... are integral to all areas of life in today’s world,” ...
(Date:11/24/2014)... -- Senior Vice President, General Manager for ... business acumen Elsevier , a world-leading ... services, congratulates Diane Bartoli , Senior Vice President ... Clinical Solutions, for being recognized in the 13 th ... of Profiles in Diversity Journal ® . ...
Breaking Biology Technology:La curcumine présentant la plus haute biodisponibilité bientôt en vente en Europe 2La curcumine présentant la plus haute biodisponibilité bientôt en vente en Europe 3Five US Winners Among Recipients of Hamdan Medical Awards 2SPIE Digital Library Now Available to High Schools, Two-Year Colleges at No or Low Cost 2Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 2Elsevier Clinical Solutions' Diane Bartoli Featured In Profiles in Diversity Journal's 13th Annual Women Worth Watching Issue 3
Cached News: