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Bacteriophages have been found to have new uses–making car fuel! April 29, 2010

Posted by Jill in Biology, Chemistry, Environment/Conservation, Fun, Genetics, Science & Culture.
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hydrogen-fueled car

For those molecular geneticists out there, you will appreciate the new discovery of using a genetically modified M13 phage as a source for making hydrogen fuel out of water!

The M13 bacteriophage is often used in molecular genetics work as a cloning vector. The phage contains a single strand circular DNA genome of 6407 nucleotides that is released into a host cell as a result of the phage absorption. When used in a host cell, the, the host cell proteins will form the double-strand replicative form (RF). This new circular RF DNA is required for M13 packaging because the viral proteins are synthesized from mRNA transcribed off the strand of the RF molecule. From here, M13 DNA is packaged at the host cell membrane, and then releases the infectious particles.

Researchers have found a way to harness the M13 virus in such a way to break apart water molecules, producing hydrogen fuel. Researchers have been able to genetically modify the M13 virus, normally infecting bacteria, so that it would instead bind to a catalyst called iridium oxide and a biological pigment, zinc porphyrins. The viruses then will naturally arrange themselves into a wirelike structure while the catalyst and pigments will harvest sunlight to divide the oxygen from the water molecule. The virus works in this mechanism in that the pigment acts as an “antenna” to collect the sunlight and transfer the energy down to the virus, emulating photosynthesis.

Researchers have successfully been able to separate the oxygen from the water molecule, which is the hardest part of the water-splitting process. The hydrogen will then split into its parts (electrons and protons), but researchers are still attempting to harvest the hydrogen parts in order to collect the gas separately and then convert the gas eventually into hydrogen fuel.

The benefits to this are numerous, including finding a green way of obtaining hydrogen fuel without creating carbon emissions as well as making the process self-sustaining. The ability to harness the mechanisms of photosynthesis in order to control the electron transport in a system is one of the biggest problems in creating a system for artificial synthesis, but this approach allows the transfer of electrons to be controlled.

The full article can be found here: GM viruses offer hope of future where energy is unlimited

I have also included an entertaining rap dealing with photosynthesis: Photosynthesis Rap

And before you’re a skeptic and are thinking that no one would make up a rap about photosynthesis, I found another rap about ATP synthesis: ATP Synthesis Rap

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