Product Specification Alternative Name: Sphingomyelin cholinephosphohydrolase Formulation: Liquid. Supplied in 50% glycerol/0.25 M phosphate buffer. Specific Activity: Specific activity: 100-300 U/mg protein. One unit will hydrolyze 1 µmol of TNPAL-sphingomyelin per minute at pH 7.4 and 37°C CAS: 9031-54-3 Source/Host: Isolated from Staphylococcus aureus. Application: May be used exogenously to initiate the sphingomyelin signaling pathway. Has very little activity on phosphatidylcholine. Long Term Storage: +4°C