Navigation Links
Photosynthesis: The last link in the chain
Date:1/4/2013

For almost 30 years, researchers have sought to identify a particular enzyme that is involved in regulating electron transport during photosynthesis. A team at Ludwig-Maximilians-Universitt (LMU) in Munich has now found the missing link, which turns out to be an old acquaintance.

Photosynthesis sustains life on Earth by providing energy-rich compounds and the molecular oxygen that higher organisms depend on. The process is powered by sunlight, which is captured by "biochemical solar cells" called photosystems that are found in plants, algae and certain types of bacteria. Plants have two photosystems, PSI and PSII. Each consists of a pigment-protein complex that uses solar energy to raise electrons to a higher energy level. These are then passed along a chain of electron acceptors, and the energy released is employed for synthesis of ATP, the "coinage" used for all energy transactions in cells.

Electron transport can proceed along several different routes. So-called linear electron transport requires the participation of both PSI and PSII, and delivers the electrons to a small molecule called NADP, forming NADPH. Cyclic electron flow on the other hand - which can take two alternative paths - involves only PSI, and is used solely for the production of ATP. Electrons that follow the major route are passed via an acceptor called plastoquinone to the cytochrome b6f complex and from there back to PSI, thus completing the cycle.

"The identity of the carrier that donates electrons to plastoquinone, and thus makes the process of cyclic electron flow possible, has long been a subject of controversy," says LMU biologist Professor Dario Leister, who, together with other members of his group, has now succeeded in identifying the crucial missing link in the process.

The crossroads that closes the circuit

Plants can switch between linear and cyclic modes of electron transport in order to maintain the appropriate balance between
'/>"/>

Contact: Kathrin Bilgeri
kathrin.bilgeri@lmu.de
49-892-180-6938
Ludwig-Maximilians-Universitt Mnchen
Source:Eurekalert

Page: 1 2

Related biology news :

1. Oil and water: An icy interaction when oil chains are short, but steamy when chains are long
2. Chain reaction in the human immune system trapped in crystals
3. Pilot Results Move GHX Closer to Delivery of Healthcare Industrys First Implantable Device Supply Chain Solution
4. Stanford scientists document fragile land-sea ecological chain
5. Copper chains: Study reveals Earths deep-seated hold on copper
6. Study confirms oil from Deepwater Horizon disaster entered food chain in the Gulf of Mexico
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/26/2015)... , August 26, 2015 ... Four, and Five Factor), Application (Travel & Immigration, Government, ... - Global Forecast to 2020", published by MarketsandMarkets, Multi-Factor ... by 2020, growing at a CAGR of 17.7% between ... and 82 F igures spread through 169 ...
(Date:8/20/2015)... 20, 2015   Sensory, Inc ., a ... user experience and security of consumer electronics through ... that its TrulySecure™ is the first ... be FIDO Certified™. The FIDO (Fast ... the FIDO UAF (Universal Authentication Framework) 1.0 specifications, ...
(Date:8/17/2015)... OXFORD, Conn. , Aug. 17, 2015  NXT-ID, ... a biometric authentication company focused on the growing mobile ... announces its new sales campaign for Q4 2015. The ... winning marketing team consisting of Amplitude Marketing Group ( ... Amplitude Marketing Group is a leader in retail driven ...
Breaking Biology News(10 mins):Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 2Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 3Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 4Multi-Factor Authentication Market Worth 9.60 Billion USD by 2020 5TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 2TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 3TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 4TrulySecure From Sensory Becomes First Face and Voice Biometrics Technology to be FIDO UAF Certified 5NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 2NXT-ID, Inc. Launches Sales Campaign for Wocket Smart Wallet with Award Winning Marketing Team 3
... sensitive new genetic test can now detect a crippling disease ... to Virginia and north to Canada. Although it does not ... red tide, the disease can have a significant impact on ... harvests and commercial aquaculture operations. , QPX - for quahog ...
... future of the tropics unfolds, scientists must explain the ... increase and environmental changesAs human populations and their impacts ... many different ways. Forests are being cleared, burned, ... they are also being altered in insidious ways by ...
... me sad when an article that should have picture doesn't ... student's group in the iGEM competition , check it out! ... 'camera'. , Using Petri dishes full of genetically engineered ... of Texas at Austin and UCSF successfully created the first-ever ...
Cached Biology News:New genetic test can detect clam disease 2Scientists must offer solutions for conserving tropical forests in a rapidly changing world 2Student scientists create living bacterial photographs 2Student scientists create living bacterial photographs 3
(Date:9/2/2015)... BioLight Life Sciences Investments ... a firm that invests in, manages and commercializes ... today that presentations highlighting its IOPtiMate™ system for ... the Ophthalmology Futures European Forum and the XXXIII ... Refractive Surgeons ("ESCRS"), both taking place in the ...
(Date:9/2/2015)... ... ... Temarry Recycling's new $100,000 waste to energy capital project ... to contribute to the sustainability of our natural resources. , Waste to Energy ... operating at their Mexico facility, Recicladora Temarry, for the last 7 years. While ...
(Date:9/1/2015)... 2015 The American Brain Tumor Association (ABTA) ... Discovery Research Grant program. LOIs are due no later ... Discovery Grants are one-year, $50,000 grants that ... change current diagnostic or treatment paradigms for adults and ... research at its earliest stages, in the hopes that ...
(Date:9/1/2015)... ... September 01, 2015 , ... AxioMx Inc. ... the National Institutes of Health (NIH) has awarded the company a Phase I ... NIH’s National Institute of Diabetes and Digestive and Kidney Diseases. AxioMx will use ...
Breaking Biology Technology:Presentations to Highlight BioLight's IOPtiMate[TM] System at Upcoming European Ophthalmology Conferences 2Presentations to Highlight BioLight's IOPtiMate[TM] System at Upcoming European Ophthalmology Conferences 3Temarry Recycling’s New $100,000 Waste to Energy Renovation 2American Brain Tumor Association Seeks Innovative Concepts For Discovery Research Grants 2AxioMx Announces Receipt of SBIR Grant for DNA-Protein Complex Antigen Development 2AxioMx Announces Receipt of SBIR Grant for DNA-Protein Complex Antigen Development 3
... Corp. (Nasdaq: KOOL ), a leading supplier of ... cells, said today that the FDA has agreed with its ... AXP disposable bagsets that it announced in November.At that time, ... result of any safety issues; the field action was a ...
... Va., Feb. 26 Insmed Inc. (Nasdaq: ... it will host a conference call on Wednesday, March ... results for the fourth quarter and year-end 2008. ... before the market opens on March 11th.To participate in ...
... launched its revolutionary Trusted LASIK Surgeons directory service and ... a resource for consumers seeking to improve their vision ... improve their chances of attaining 20-20 vision. What ... unique screening process ensuring that only those who are ...
Cached Biology Technology:ThermoGenesis Says FDA Concurs with Plan for Previously Announced AXP(TM) Bagset Recall 2ThermoGenesis Says FDA Concurs with Plan for Previously Announced AXP(TM) Bagset Recall 3Insmed to Host Fourth Quarter and Full-Year 2008 Conference Call 2Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 2Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 3Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 4Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 5Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 6Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 7Rick Fraunfelder, M.D. of the Casey Vision Correction Center in Portland, Oregon, Joins Elite Group of Surgeons Listed at Trusted LASIK Surgeons 8
... Specificity: This antibody recognizes ... not cross-react with other related ... antibody with murine IRF7 protein ... analysis of the 293T cells ...
Rabbit anti-phospho-EGFr (Tyr992) - Concentrate...
Contains L-glutamine...
... biosynthesized by the 11(R)-LOs of the ... fresh water hydra, H. vulgaris. The ... oocyte maturation and tentacle regeneration, respectively, ... produced when aspirin-treated recombinant COX-2 is ...
Biology Products: