OriginLife2

OriginLife2 - In The Beginning . Atmosphere contained H2O,...

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Atmosphere contained H2O, CO2, CO, CH4, SO4, NH3, and possibly NO2 No "free" oxygen (O2) - detrital pyrite and uraninite, - no "red bed" sediments No Ozone layer - lots of UV radiation Ocean condensed water vapor in atmos. - may have bee fresh initially Initial rain would have been very acidic lots of volcanoes and meteorite/comet impacts In The Beginning …….
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Miller and Urey experiment; 1953 gasses present in primordial atmosphere CO 2 CO H 2 O NH 3 HCl CH 4 H 2 S N 2 condensed products of the reaction included amino acids in left and right– handed isomers
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Sydney Fox When heated with phosphoric acid, amino acids spontaneously form protein-like chains – polypeptides. When cooled, the polypeptides form “ proteinoid microspheres Walls osmotically active, absorb polypeptides and grow, when large, bud off new spheres
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Jack Szostak Works with phospho-lipid spheres (wall structure resembles cell) Selectively osmotic Will form spontaneously in presence of Montmorillonite clay RNA fragment inside stabilizes wall and makes them competitively superior (can absorb other spheres)
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Ribozymes Tom Cech – 1980’s – discovered ribozymes – RNA molecules that could replicate selves and catalyze reactions
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This note was uploaded on 10/23/2011 for the course GLY 1000 taught by Professor Parker during the Spring '11 term at FSU.

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OriginLife2 - In The Beginning . Atmosphere contained H2O,...

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