| タイトル | pH profile of the adsorption of nucleotides onto montmorillonite. I - Selected homoionic clays |
| 著者（英） | Kao, J.; Cook, A.; Edelson, E.; Banin, A.; Church, F. M.; Lawless, J. G.; Lowe, T.; Mazzurco, J.; Orenberg, J. B.; Huff, R. |
| 著者所属（英） | Exxon Chemical Co., Inc.|NASA Ames Research Center|Hebrew Univ.|San Francisco State Univ. |
| 発行日 | 1985-01-01 |
| 言語 | eng |
| 内容記述 | The effect of pH and adsorbed ions on the adsorption of purine and pyrimidine nucleotides on montmorillonite clay was studied experimentally. The specific nucleotides examined were: 5 prime-AMP; 3-prime AMP; and 5 prime-CMP. The pH of the clay samples was adjusted to various levels in the 2-12 pH range using microliter volumes of concentrated acid (1N HCl) and base (1NHNaOH). It was found that preferential adsorption among nulceotides was dependent on the pH level and on the characteristics of the substituted metal cation and anion exchange mechanisms. Below pH 4, adsorption was attributed to cation and anion exchange mechanisms. Above pH 4, however, adsorption was attributed to the complexation mechanisms occurring between the metal cations in the clay exchange site and in the biomolecule. The possible role of homoionic clays in the concentration mechanisms of biomonomers in the prebiotic environment is discussed. |
| NASA分類 | SPACE BIOLOGY |
| レポートNO | 85A36094 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/391208 |
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