[1] Vanderbilt Univ, Sch Med, Ctr Mol Toxicol, Dept Chem, Nashville, TN 37232 USA
[2] Vanderbilt Univ, Sch Med, Ctr Mol Toxicol, Dept Biochem, Nashville, TN 37232 USA
[3] Univ Maryland, Ctr Adv Res Biotechnol, Maryland Biotechnol Inst, Shady Grove, MD USA
[4] NIST, Rockville, MD 20850 USA