Z-Glu-Tyr enzyme substrate product blog Tags: Enzyme Substrate; Z-Glu-Tyr; Z-Glu-Tyr enzyme substrate; Posted by mybiosource_staff on . The Z-Glu-Tyr n/a (Catalog #MBS406402) is a Substrate and is intended for research purposes only. The product is available for immediate purchase.To buy or view more detailed product information and pricing, please click on the technical datasheet page below:Z-Glu-TyrBenzyloxycarbonyl-L-Glutamyl-L-Tyrosine (M.W. 444.43) C H N O [988-75-0] Grade AA.Cas Number: 988-75-0.