I am looking for a source of radiolabled glutathione (reduced form) for use in a biochemical assay. Does anyone know where I might find any? Marian L. McKee, Ph.D. Laboratory of Molecular Biology, NIH, NCI 37 Convent Drive MSC 4255 Bethesda, MD 20892-4255 Phone 301-402-0241 Fax 301-402-1969 E-mail mmckee at helix.nih.gov