Der er i de senere år forsket meget i abiogenese:
Abiogenese er flg. proces:
Uorganisk materiale => Organisk materiale => Protocelle
Hermed:
Livets skabelse = Abiogenese
Livets udvikling = evolution
Herunder en del info og links om abiogenese:
Fra:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/A/AbioticSynthesis.html
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An RNA Beginning?
All metabolism depends on enzymes and, until recently, every enzyme has turned out to be a protein. But proteins are synthesized from information encoded in DNA and translated into mRNA. So here is a chicken-and-egg dilemma. The synthesis of DNA and RNA requires proteins. So
* proteins cannot be made without nucleic acids and
* nucleic acids cannot be made without proteins.
The discovery that certain RNA molecules have enzymatic activity provides a possible solution. These RNA molecules - called ribozymes - incorporate both the features required of life:
* storage of information
* the ability to act as catalysts
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Kig også under: "The First Cell?" på samme side, så sent som i 2007/ 2008 kom nye interessante resultater i forskningen omkring Abiogenese.
Igen vi er ikke i mål, men meget tyder på at vi er få år fra at skabe en organisk celle ud fra uorganisk materiale via naturens egne virkemidler.
Fra "Creating Life?" på samme side
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Several recent advances suggest that we may be getting close to creating life. (But note that these examples represent laboratory manipulations that do not necessarily reflect what may have happened when life first appeared.)
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Bemærk noten i den sidste kommentar, der reelt set betyder at man via forskningen finder een/ flere måder hvorpå liv kan starte via naturens egne virkemidler, men ikke alle. Potentialet kan være at der er millioner af måder hvorpå liv kan starte og vi blot kommer til at kende nogle.
The Origin of Life - Abiogenesis - Dr. Jack W. Szostak
This has been CONFIRMED in Dr. Jack Szostak's LAB. 2009 Nobel Laurette in medicine for his work on telomerase.
http://www.youtube.com/watch?v=U6QYDdgP9eg
Fra 2:30 til slut forklares hvorledes abiogenese foregår, med baggrund i laboratorie forsøg, hvormed teorien er særdeles godt supporteret via observationer.
En lille detalje, som jeg opdagede, er at abiogenese ikke længere blot er en hypotese, men kvalificeres som en teori, formentlig grundet de store fremskridt der skete i perioden 2007 - 2009, hvor han såmænd fik nobel prisen for sit arbejde!
The Nobel Prize in Physiology or Medicine 2009
http://nobelprize.org/nobel_prizes/medicine/laureates/2009/press.html
The Origin of Life - Abiogenesis - Interview with Jack Szostak
http://www.youtube.com/watch?v=3OwSARYTK7w
http://exploringorigins.org/
http://genetics.mgh.harvard.edu/szostakweb/
http://genetics.mgh.harvard.edu/szostakweb/movies.html
Template-directed synthesis of a genetic polymer in a model protocell:
http://genetics.mgh.harvard.edu/szostakweb/publications/Szostak_pdfs/Mansy_et_al_Nature_2008.pdf
http://tinyurl.com/6pqvx9
Evolution in an RNA World
http://symposium.cshlp.org/content/early/2009/08/06/sqb.2009.74.004.abstract
A self-replicating ligase ribozyme
http://www.pnas.org/content/99/20/12733.abstract
The dawn of the RNA World: Toward functional complexity through ligation of random RNA oligomers
http://rnajournal.cshlp.org/content/15/5/743.abstract