Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
MINERAL INDUCED FORMATION OF SUGAR PHOSPHATES * S. PITSCH 1'2, A. ESCHENMOSER l, B. GEDULIN 2, S. HUI 2 and G. ARRHENIUS e
 

Summary: MINERAL INDUCED FORMATION OF SUGAR PHOSPHATES *
S. PITSCH 1'2, A. ESCHENMOSER l, B. GEDULIN 2, S. HUI 2 and G. ARRHENIUS e
1Laboratorium fiir Organisehe Chemic, ETH-Zentrum, CH 8092 Z~irich*,Switzerland
2Scripps Institution of Oceanography, Universi~ of California San Diego, La Jolla, CA
92093-0220, U.S.A.
(Recdved January 23, 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 glycolaldehydephosphate
is practically completely sorbed within an hour from solutions with concentrations as low as 50 #m;
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.
1. Introduction

  

Source: Arrhenius, Gustaf - Integrative Oceanography Division, Scripps Institution of Oceanography

 

Collections: Environmental Sciences and Ecology; Geosciences; Biology and Medicine