| Autor: | Aubrey R. Hill, Leslie E. Orgel, Christof Böhler |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
General Medicine Hydroxylapatite engineering.material Oligomer Amino acid chemistry.chemical_compound Residue (chemistry) Monomer chemistry Polymerization Space and Planetary Science Aspartic acid Illite Polymer chemistry engineering Organic chemistry Ecology Evolution Behavior and Systematics |
| Zdroj: | Origins of Life and Evolution of the Biosphere. 28:235-243 |
| ISSN: | 0169-6149 |
| DOI: | 10.1023/a:1006572112311 |
| Popis: | Oligomers of the negatively-charged amino acids, glutamic acid, aspartic acid, and O-phospho-L-serine are adsorbed by hydroxylapatite and illite with affinities that increase with oligomer length. In the case of oligo-glutamic acids adsorbed on hydroxylapatite, addition of an extra residue results in an approximately four-fold increase in the strength of adsorption. Oligomers much longer than the 7-mer are retained tenaciously by the mineral. Repeated incubation of short oligo-glutamic acids adsorbed on hydroxylapatite or illite with activated monomer leads to the accumulation of oligomers at least 45 units long. The corresponding reactions of aspartic acid and O-phospho-L-serine on hydroxylapatite are less effective in generating long oligomers, while illite fails to accumulate substantial amounts of long oligomers of aspartic acid or of O-phospho-L-serine. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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