The Origins of Life on the Earth |
From inside the book
Results 1-3 of 29
Page 137
*H,N —CHR1–C–NH-CHR,-C—O + RHN–C–NHR (2) The overall result is the
condensation of two amino acid residues to form a dipeptide, and the hydration of
the carbodiimide to a urea by the water generated in the condensation.
*H,N —CHR1–C–NH-CHR,-C—O + RHN–C–NHR (2) The overall result is the
condensation of two amino acid residues to form a dipeptide, and the hydration of
the carbodiimide to a urea by the water generated in the condensation.
Page 158
In a reciprocal fashion, poly C facilitates the condensation of pairs of guanosine
monomers, but has no effect on the condensation of guanylic acid with uridine,
cytidine, or adenosine. Finally, poly U has no effect on the condensation of ...
In a reciprocal fashion, poly C facilitates the condensation of pairs of guanosine
monomers, but has no effect on the condensation of guanylic acid with uridine,
cytidine, or adenosine. Finally, poly U has no effect on the condensation of ...
Page 222
Although many important biochemicals can be synthesized under prebiotic
conditions, we know much less about prebiotic condensation reactions. It has, for
example, turned out to be surprisingly difficult to obtain nucleosides from bases
and ...
Although many important biochemicals can be synthesized under prebiotic
conditions, we know much less about prebiotic condensation reactions. It has, for
example, turned out to be surprisingly difficult to obtain nucleosides from bases
and ...
What people are saying - Write a review
We haven't found any reviews in the usual places.
Contents
INTRODUCTION | 1 |
GEOLOGICAL EVIDENCE | 16 |
The Present Oxidizing Atmosphere | 34 |
Copyright | |
17 other sections not shown
Common terms and phrases
abundant adenine alanine aldehydes amino acids ammonia ammonium amounts aqueous solution aspartic acid biochemical biological carbon Chem chemical concentration condensation contain COOH cyanamide cyanate cyanoacetylene cyanogen cytosine decomposition electric discharge energy enzyme equilibrium evolution evolved example formaldehyde formation formed genetic geological glutamic acid glycine half-lives hydrogen cyanide hydrolysis hydrolyzed important inorganic isomers L. E. Orgel living organisms lysine mechanism membranes metabolism meteorite methane mixture molecules nitrogen nucleic acids nucleosides obtained occur OH OH OH optically active organic compounds origin oxidation oxygen pathways peptide phosphate phosphorylation photochemical photosynthesis planets poly polymerization polymers polynucleotides polypeptides possible prebiotic conditions prebiotic synthesis Precambrian present primitive atmosphere primitive earth primitive ocean purines pyrimidines reaction replication rocks S. L. Miller S. W. Fox Science sequence solar system stars structure sugars surface t-RNA temperature tetramer thermal ultraviolet light uridine yield