Hydroxytyrosol and tyrosol sulfate metabolites protect against the oxidized cholesterol pro oxidant effect in Caco 2 human enterocyte like cells Food & Function (RSC Publishing) Glutathione conjugation Sulfate uptake and assimilation HORT640 Metabolic Plant Physiology Department of Horticulture and Landscape Architecture Purdue University Pentose Phosphate Pathway Item Scheme showing the enzymatic reactions that catalyze the pyruvate dehydrogenase complex, including pyruvate dehydrogenase activity and diaphorase activity of DLD (A) as well as the glutathione reductase peroxidase activity (B).