The Origins of Life on the Earth |
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Page vii
... Thermal Synthesis , 141 Thermal Synthesis of Polypeptides , 143 Other Condensation Mechanisms , 146 Reactions of the Aminoacyl Phosphates on Clays , 147 References , 148 12. FROM RANDOM POLYMERS TO THE MOST PRIMITIVE ORGANISM , 152 ...
... Thermal Synthesis , 141 Thermal Synthesis of Polypeptides , 143 Other Condensation Mechanisms , 146 Reactions of the Aminoacyl Phosphates on Clays , 147 References , 148 12. FROM RANDOM POLYMERS TO THE MOST PRIMITIVE ORGANISM , 152 ...
Page 143
... THERMAL SYNTHESIS OF POLYPEPTIDES The thermal synthesis of polypeptides has been studied very extensively , particularly by S. W. Fox . When a pure amino acid is heated to about 180 ° C , tarry products , varying quantities of ...
... THERMAL SYNTHESIS OF POLYPEPTIDES The thermal synthesis of polypeptides has been studied very extensively , particularly by S. W. Fox . When a pure amino acid is heated to about 180 ° C , tarry products , varying quantities of ...
Page 144
... thermal polypeptides . Most of the bonds in thermal polypeptides are of the normal type , but those formed from mixtures which include aspartic and glutamic acid also contain α - ẞ and a - y amide links , respectively . Abnormal bonds ...
... thermal polypeptides . Most of the bonds in thermal polypeptides are of the normal type , but those formed from mixtures which include aspartic and glutamic acid also contain α - ẞ and a - y amide links , respectively . Abnormal bonds ...
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