- Expression of human estrogen sulfotransferase in Salmonella typhimurium: differences between hHST and hEST in the enantioselective activation of 1-hydroxyethylpyrene to a mutagen. Hagen, M., Pabel, U., Landsiedel, R., Bartsch, I., Falany, C.N., Glatt, H. Chem. Biol. Interact. (1998)