STEPEHN J. LIPPARD is Arthur Noyes Professor in the Department of Chemistry at the Massachusetts Institute of Technology. His recent honors include election to the American Academy of Arts and Sciences in 1986, the 1987 Remson Award of Maryland Section of the ACS, the 1987 ACS Award in Inorganic Chemistry sponsored by the Monsanto Company, a 1988 Humboldt U.S. Senior Scientist Award, and election to the National Academy of Sciences in 1989.

• Subsite-Specific Structures and Reactions in Native and Synthetic(4Fe-4S) Cubane-Type Clusters (R. Holm, et al.). Indoleamine 2,3-Dioxygenase: Properties and Functions of aSuperoxide Utilizing Enzyme (O. Hayaishi, et al.). Dinuclear Iron- and Manganese-Oxo Sites in Biology (L. Que & A.True). Metal Ion Promoted Reactions of Phosphate Derivatives (P. Hendry& A. Sargeson). Long-Range Electron Transfer in Donor (Spacer) Acceptor Moleculesand Proteins (B. Bowler, et al.). Mercury(II)-Thiolate Chemistry and the Mechanism of the Heavy MetalBiosensor MerR (J. Wright, et al.). Probing Nucleic Acids with Transition Metal Complexes (A. Pyle& J. Barton). Biological Processing of DNA Modified by Plantinum Compunds (S.Bruhn, et al.). Subject Index. Cumulative Index, Volumes 1-38.