A new method selects aptamers that bind a complex of a synthetic receptor (blue) and a small molecule (red).

Credit: Milan Stojanovic

 

Aptamers For Small Molecules

Biosensors: Strategy for designing custom oligonucleotides could lead to biosensors for small metabolites

read at

 http://cen.acs.org/articles/92/i40/Aptamers-Small-Molecules.html