Claim: Glutathione—homocystine transhydrogenase is an enzyme, proteins that act as biological catalysts to accelerate chemical reactions.
Evidence: In enzymology, a glutathione—homocystine transhydrogenase (EC ) is an enzyme that catalyzes the chemical reaction Enzymes /ˈɛnzaɪmz/ are proteins that act as biological catalysts (biocatalysts). Catalysts accelerate chemical reactions.