Methyltransferase activities of wild type ... were crosslinked in a 20 μl reaction with increasing concentrations of NaCl, ranging from 150 mM to 2 M, using 0.025% (v/v) of glutaraldehyde ...

The AptaFluor SAH Methyltransferase Assay uses a highly sensitive RNA aptamer that is capable of directly detecting SAH. The sensitivity of the aptamer (measures SAH at concentrations below 10 nM ...