Introduction. Mono(ADP-ribosyl)Transferases and Related Enzymes: Emerging Gene Families; F. Koch-Nolte, F. Haag. Mono-ADP-ribosylation in Prokaryotes. Crystal Structure of Diphtheria Toxin Bound to Nicotinamide Adenine Dinucleotide; C.E. Bell, D. Eisenberg. Molecular Approaches to Eukaryotic Mono(ADP-ribosyl)Transferases. Sequence and Structural Links Between Distant ADp-ribosyltransferase Families; F. Bazan, F. Koch-Nolte. Moni(ADP-ribosyl)Transferases in the Immune System. Regulation of Cytotoxic T Cell Functions by a GPI-anchored Ecto-ADP-ribosyltransferase; J. Wang, et al. Mono-ADP-ribosylation in Other Animal Tissues. An ADP-Ribosyltransferase from Bovine Erythrocytes Apparently Specific for Cysteine Residues; S. van Heyningen, B. Saxty. Physiology of GPI-Anchored Proteins. Cell Surface Dynamics of GPI-anchored Proteins; F.R. Maxfield, S. Mayor. Relationship of ADP-Ribosyltransferases to NAD+ Glycohydrolases and ADP-ribosyl Cyclases. ADp-Ribose in Glycation and Glycoxidation Reactions; E.L. Jacobson, et al. Special Lecture Commemorating the Retirement of Professor Heinz-Günter Thiele. Appendix. 28 Additional Lectures. 24 Poster Reports. Index.