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Mineral induced formation of sugar phosphates
- Source :
- Origins of Life and Evolution of the Biosphere. 25:297-334
- Publication Year :
- 1995
- Publisher :
- Springer Science and Business Media LLC, 1995.
-
Abstract
- Glycolaldehyde phosphate, sorbed from highly dilute, weakly alkaline solution into the interlayer of common expanding sheet structure metal hydroxide minerals, condenses extensively to racemic aldotetrose-2,4-diphosphates and aldohexose-2,4,6-triphosphates. The reaction proceeds mainly through racemic erythrose-2,4-phosphate, and terminates with a large fraction of racemic altrose-2,4,6-phosphate. In the absence of an inductive mineral phase, no detectable homogeneous reaction takes place in the concentration- and pH range used. The reactant glycolaldehyde phosphate is practically completely sorbed within an hour from solutions with concentrations as low as 50 micrometers; the half-time for conversion to hexose phosphates is of the order of two days at room temperature and pH 9.5. Total production of sugar phosphates in the mineral interlayer is largely independent of the glycolaldehyde phosphate concentration in the external solution, but is determined by the total amount of GAP offered for sorption up to the capacity of the mineral. In the presence of equimolar amounts of rac-glyceraldehyde-2-phosphate, but under otherwise similar conditions, aldopentose-2,4,-diphosphates also form, but only as a small fraction of the hexose-2,4,6-phosphates.
- Subjects :
- chemistry.chemical_classification
Minerals
Evolution, Chemical
Sugar phosphates
Aqueous solution
Metal hydroxide
Inorganic chemistry
Formaldehyde
Stereoisomerism
Fraction (chemistry)
Sorption
Acetaldehyde
General Medicine
Hydrogen-Ion Concentration
Glyceraldehyde
Solutions
chemistry.chemical_compound
chemistry
Space and Planetary Science
Phase (matter)
Hydroxides
Sugar Phosphates
Isomerization
Ecology, Evolution, Behavior and Systematics
Subjects
Details
- ISSN :
- 15730875 and 01696149
- Volume :
- 25
- Database :
- OpenAIRE
- Journal :
- Origins of Life and Evolution of the Biosphere
- Accession number :
- edsair.doi.dedup.....1d72e38f086d982d5ac9168811020e25