Glutathione peroxidase 1 (GPX1) (Bryant et al. 1982, Sutherland et al. 2001), 2 (GPX2) (Chu et al. 1993), and 4 (Bryant et al. 1982, Sutherland et al. 2001) reduce 5-hydroperoxyeicosatetraenoic acid (5-HpETE) to 5-hydroxyeicosatetraenoic acid (5-HETE) in the presence of glutathione (GSH). This reaction is inferred from the event in rabbit involving the protein GPX1 (Chiba et al. 1999).