Shrimp alkaline phosphatase, a thermo labile form of alkaline phosphatase is available from USB/Amersham Life Sciences. P. Flick -- Parke K. Flick, Ph.D. ch994 at cleveland.freenet.edu USB/Amersham Life Sciences, Inc. Cleveland, OH 44128 Ph: 216-464-9277; FAX: 216-360-0975