Supplied as a 0.2 μm filtered solution in MES and NaCl.
Bio-activity
Measured by its ability to hydrolyze the substrate N-acetyl-L-Asp-L-Glu into N-acetyl-L-Asp and L-Glu. The L-Glu product is measured by fluorescence after its derivatization by ortho-phthaldialdehyde. The specific activity is>400 pmol/min/µg.