Minisymposium on Diagnostic and Therapeutic Applications of Radiolabeled Antibodies: Methods for the Radiohalogenation of Antibodies; M. Zalutsky. Selective Functionalization of Alkanes by Enzymes and Their Models: Oxygenation by Methane Monooxygenase; J. Lipscomb. Relevance of GIF Chemistry to Enzyme Mechanisms; D.H.R. Barton. Protein Folding and Refolding for Commercially Important Proteins: Mutations Affecting Protein Folding and Misfolding In Vivo; A. Mitraki. Environmental Biotechnology: Organophosphorus Cholinesterase Inhibitors; J. DeFrank. Protein Processing New Techniques: Immobilized Artificial Membrane Chromatography; C. Pidgeon. Expression Systems Exogenous Proteins: Bacillus Subtilis; R. Doi. Poxvirus Vectors; B. Moss. Fifteen additional articles. Index.