Differing cytotoxicity and bioavailability of selenite,methylselenocysteine, selenomethionine,selenosugar 1 and trimethylselenonium ion and their underlying metabolic transformations in human cells
1. Institute of Nutritional Science, University of Potsdam, Nuthetal, Germany;2. Institute of Chemistry–Analytical Chemistry, University of Graz, Graz, Austria