The Origins of Life on the Earth |
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Page 166
Stanley L. Miller, Leslie E. Orgel. Chapter Thirteen Optical Activity The presence of optically active organic compounds in living organisms is one of their most striking characteristics . The proteins are composed entirely of L - amino ...
Stanley L. Miller, Leslie E. Orgel. Chapter Thirteen Optical Activity The presence of optically active organic compounds in living organisms is one of their most striking characteristics . The proteins are composed entirely of L - amino ...
Page 169
... optically specific system such as an enzyme . Thus , it is probably easier for an enzyme to distinguish D - phenylalanine from L - phenylalanine than ... active because it contains a greater concentration of the isomer Optical Activity 169.
... optically specific system such as an enzyme . Thus , it is probably easier for an enzyme to distinguish D - phenylalanine from L - phenylalanine than ... active because it contains a greater concentration of the isomer Optical Activity 169.
Page 170
... optically inactive substance generating optical activity is the ... active quartz occur in the earth's crust , and it has been repeatedly ... optically active compounds on the primitive earth . ( 9 ) If optically - active compounds were ...
... optically inactive substance generating optical activity is the ... active quartz occur in the earth's crust , and it has been repeatedly ... optically active compounds on the primitive earth . ( 9 ) If optically - active compounds were ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
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abundant active adenine alanine aldehydes amino acids ammonia ammonium amounts anticodon aqueous solution aspartic acid biochemical biological CaCO3 carbon CH₂ chain chemical chert CO₂ concentration condensation contain COOH cyanoacetylene cytosine decomposition dust cloud electric discharge energy enzyme equilibrium escape layer evolution example formaldehyde formation formed gases genetic geological glutamic acid glycine H₂ H₂N H₂O hydrocarbons hydrogen cyanide hydrolysis hydrolyzed important inorganic L. E. Orgel limestone living organisms material mechanism membranes metabolism meteorites methane minerals mixture molecules N₂ NH₂ nitrogen nucleic acids nucleotides O₂ obtained occur organic compounds origin oxidation oxygen pathways peptide phosphate phosphorylation photochemical photosynthesis planets polymers polynucleotides polypeptides prebiotic prebiotic synthesis Precambrian present pressure primitive atmosphere primitive earth primitive ocean purines reaction replication rocks Schopf Science sequence solar system structure sugars surface t-RNA temperature ultraviolet light volcanoes yield