Distribution of the Lanthanides in the Earth's CrustStuart Ross Taylor and Scott M. McLennan Mobilization of Lanthanides through the Terrestrial BiosphereRobert A. Bulman Complexes of Lanthanide Ions with Amino Acids, Phosphates, and Other Ligandsof Biological Interest in SolutionHerbert B. Silber and Sarah J. Paquette Biologically Relevant Structural Coordination Chemistry of Simple LanthanideIon ComplexesJack M. Harrowfield Lanthanide Ions as Probes in Studies for Metal Ion-Dependent EnzymesEtsuro Yoshimura and Tokuko Watanabe Lanthanide Chelates as Fluorescence Labels for Diagnostics and BiotechnologyKazuko Matsumoto and Jingli Yuan Responsive Luminescent Lanthanide ComplexesDavid Parker and J. A. Gareth Williams Lanthanide Ions as Probes of Electron Transfer in ProteinsRonald M. Supkowski and William DeW. Horrocks, Jr. Lanthanide Ions as Luminescent Probes of Proteins and Nucleic AcidsClaudia Turro, Patty K.-L. Fu, and Patricia M. Bradley Lanthanide-Promoted Peptide Bond HydrolysisMakoto Komiyama and Tohru Takarada Lanthanide-Catalyzed Hydrolysis of Phosphate Esters and Nucleic AcidsHans-Jörg Schneider and Anatoly K. Yatsimirsky Sequence-Selective Scission of DNA and RNA by Lanthanides and TheirComplexesMakoto Komiyama Lanthanide Ions as Probes for Metal Ions in the Structure and CatalyticMechanism of RibozymesRoland K. O. Sigel and Anna Marie Pyle Lanthanides as Shift and Relaxation Agents in Elucidating the Structure ofProteins and Nucleic AcidsCarlos F. G. C. Geraldes and Claudio Luchinat Lanthanide Ions as Magnetic Resonance Imaging Agents. Nuclear and ElectronicRelaxation Properties. ApplicationsLothar Helm, Éva Tóth, and André E. Merbach Interactions of Lanthanides and Their Complexes with Proteins. ConclusionsRegarding Magnetic Resonance ImagingSilvio Aime, Alessandro Barge, Mauro Botta, and Enzo Terreno Metabolism and Toxicity of the LanthanidesRobert A. Bulman Cell Responses to Lanthanides and Potential Pharmacological Actions ofLanthanidesKui Wang, Yi Cheng, Xiaoda Yang, and Rongchang