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:


(Date:4/13/2016)... CHICAGO , April 13, 2016  IMPOWER physicians ... are setting a new clinical standard in telehealth ... By leveraging the higi platform, IMPOWER patients can ... weight, pulse and body mass index, and, when they ... quick and convenient visit to a local retail location ...
(Date:3/29/2016)... 29, 2016 LegacyXChange, Inc. (OTC: ... and SelectaDNA/CSI Protect are pleased to announce our successful ... a variety of writing instruments, ensuring athletes signatures against ... collectibles from athletes on LegacyXChange will be assured of ... DNA. Bill Bollander , CEO states, ...
(Date:3/22/2016)... PROVO and SANDY, Utah ... (NSO), which operates the highest sample volume laboratory in ... Tute Genomics and UNIConnect, leaders in clinical sequencing informatics ... the launch of a project to establish the informatics ... NSO has been contracted by the ...
Breaking Biology News(10 mins):
(Date:4/27/2016)... ... 27, 2016 , ... Cambridge Semantics, the leading provider of Smart ... it has been named to The Silicon Review’s “20 Fastest Growing Big Data Companies ... Semantics serves the needs of end users facing some of the most complex data ...
(Date:4/27/2016)... ... 2016 , ... The Pittcon Organizing Committee is pleased to announce that Charles ... member of Committee since 1987. Since then, he has served in a number of ... chairman for both the program and exposition committees. In his professional career, Dr. Gardner ...
(Date:4/27/2016)... April 27, 2016 NanoStruck ... (OTCPink: NSKQB) ( Frankfurt : 8NSK) ... Pressemitteilung vom 13. August 2015 die Genehmigung von ... um zusätzliche 200.000.000 Einheiten auf 400.000.000 Einheiten zu ... bringen. Davon wurden 157.900.000 Einheiten mit dem ersten ...
(Date:4/27/2016)... ... April 27, 2016 , ... The Board of Directors of ... John Tilton as Chief Commercial Officer.  Mr. Tilton joined Biohaven from Alexion Pharmaceuticals, ... leaders responsible for the commercialization of multiple orphan drug indications. Mr. Tilton ...
Breaking Biology Technology:
Cached News: