The Origins of Life on the Earth |
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Page 140
... phosphate or phosphate esters , for example , nearly all of the condensing agent undergoes anion addition rather than water addition . It is worth noticing that the activation of inorganic phosphate presents a special problem on account ...
... phosphate or phosphate esters , for example , nearly all of the condensing agent undergoes anion addition rather than water addition . It is worth noticing that the activation of inorganic phosphate presents a special problem on account ...
Page 141
... phosphate on the surface of the hydroxylapatite . H2N - C - O - PO3 + HPO H2P2O + NH + HCO3 It is interesting to note that carbamyl phosphate can react with ADP to give ATP , in the presence of a suitable enzyme . It is also an ...
... phosphate on the surface of the hydroxylapatite . H2N - C - O - PO3 + HPO H2P2O + NH + HCO3 It is interesting to note that carbamyl phosphate can react with ADP to give ATP , in the presence of a suitable enzyme . It is also an ...
Page 143
... phosphate ; pU = Uridine - 5 ' - phosphate ; Up = Uridine - 3 ' - phosphate ; pUp ! = Uri- dine - 5 ' - phosphate - 2 ' , 3 ' - cyclic phosphate ; pUp Lohrman and Orgel , Science 171 , 494 , 1971. ) THERMAL SYNTHESIS OF POLYPEPTIDES The ...
... phosphate ; pU = Uridine - 5 ' - phosphate ; Up = Uridine - 3 ' - phosphate ; pUp ! = Uri- dine - 5 ' - phosphate - 2 ' , 3 ' - cyclic phosphate ; pUp Lohrman and Orgel , Science 171 , 494 , 1971. ) THERMAL SYNTHESIS OF POLYPEPTIDES The ...
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