Does anyone know the shelf life of xanthine oxidase and if it can be frozen at -20 to -80C?

I am using XOD in one of my reagents (EDTA + a stock buffer of KH2PO4 and Na2B4O7-10H2O; pH 8.2) for superoxide dismutase enzyme kinetic assays. Since XOD is sold in units, I am going to...

01 January 2015 7,233 7 View