Description_x000D_ Biochem/physiol Actions_x000D_ Type II is the predominant IMPDH isoform and is specifically linked to a wide range of cancers and lymphocyte proliferation._x000D_ Unit Definition_x000D_ One unit will produce 1.0 μ mole of XMP from IMP with corresponding reduction of β-NAD per minute at pH 8.0 at 25 °C._x000D_ Physical form_x000D_ Solution in 20 mM Tris-HCl, pH 8.0, containing 0.5 mM EDTA and 1 mM DTT.