Aptagen, LLCDNA Thrombin Protein 0.5 nM (reported value) 50 mM Tris-HCl (pH 7.5), 100 mM NaCl, 1 mM MgCl2 NA If the oligo is a known aptamer sequence: For binding studies, perform a refolding program to ensure proper function (i.e. binding to antigen or target). Refer to the aptamer reference source for the appropriate refolding parameters and binding conditions. Note: it is unknown whether aptamer functions properly without refolding. Image does not show G quartet formation. The 29mer version has higher affinity than the 15mer version, but less inhibitory activity.