Affinity chromatography : ADP phosphatase enzymes

[bmans at ccnet.up.ac.za]

Could someone please tell me if there is an affinty column with ADP bound as 
ligand for the purification of phosphatase enzymes that do not require an 
coenzyme. And if there is, who sells it.

Thanks alot.

Ben.
University of Pretoria
Department Biochemistry
South Africa.