8:00Colorimetric Assessment of Deiodinase 1 Activity in Human Liver Microsomes Using the Sandell-Kolthoff Reaction0 views•2026•Biochemistry•Topical CollectionKonstantinos Stefanidis1,2, Nina Hambruch1, Kostja Renko3, Dorothee Funk-Weyer1, Robert Landsiedel1,2Konstantinos Stefanidis1,2Nina Hambruch1Kostja Renko3Dorothee Funk-Weyer1Robert Landsiedel1,21Experimental Toxicology and Ecology, BASF SE, 2Pharmacy, Pharmacology and Toxicology, Free University of Berlin, 3German Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R)Experimental Toxicology and Ecology, BASF SEPharmacy, Pharmacology and Toxicology, Free University of BerlinGerman Federal Institute for Risk Assessment (BfR), German Centre for the Protection of Laboratory Animals (Bf3R)