Does anyone know if a His-tagged version of enterokinase exists? Any help would be greatly appreciated. Mike -- Michael DiDonato, PhD The Scripps Research Institute Department of Molecular Biology MB4 10550 North Torrey Pines Road La Jolla, CA, 92037 email: didonato at scripps.edu Tel: (858) 784-9261 FAX: (858) 784-2277