[1] Univ Maryland Baltimore Cty, Chem & Biochem, Baltimore, MD 21228 USA
[2] Univ Maryland, Sch Pharm, Chem & Biochem, Baltimore, MD 21201 USA
[3] Univ Maryland, Sch Med, Biochem & Mol Biol, Baltimore, MD 21201 USA
[4] Ohio State Univ, Chem & Biochem, Columbus, OH 43210 USA
[5] Univ Maryland, Biochem & Mol Biol, Baltimore, MD 21201 USA