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Journal of the American Chemical Society

Efficient complexation of N-acetyl amino acid carboxylates in water by an artificial receptor: unexpected cooperativity in the binding of glutamate but not aspartate.


PMID 16045325

Abstract

A new tris-cation 1 binds N-acetyl amino acid carboxylates in water even at millimolar salt concentrations with Kass approximately 103 M-1 due to a clustering of electrostatic interactions. Binding is efficient enough to allow a naked-eyed detection using an indicator displacement assay. Furthermore, receptor 1 shows an unexpected 2:1 complex formation with strong positive cooperativity with glutamate but not aspartate.