Polymerization on the Rocks: Negatively-Charged α-amino acids

Details Polymerization on the Rocks: Negatively-Charged α-amino acids Polymerization on the Rocks: Negatively-Charged α-amino acids

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998oleb...28..235h&link_type=abstract

Origins of Life and Evolution of the Biosphere, v. 28, Issue 3, p. 235-243 (1998).

Physics

16

Scientific paper

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.

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