Progress in Nucleic Acid Research and Molecular Biology provides a forum for discussion of new discoveries, approaches, and ideas in molecular biology. It contains contributions from leaders in their fields and abundant references.Some Articles Planned for Future Volumes. Modulation of RNA Function by Oligonucleotides Recognizing RNA Structure, J.J. Toulme, C. Di Primo, and S. Moreau. Regulation of the DNA Methylation Machinery and Its Role in Cellular Transformation, M. Szyf and N. Detich. Lysosomal Multienzyme Complex: Biochemistry, Genetics, and Molecular Pathophysiology, A.V. Pshezhetsky and M. Ashmarina. Phosphoribosylpyrophosphate Synthetase and the Regulation of Phosphoribosylpyrophosphate Production in Human Cells, M.A. Becker. Ethanol Catabolism in Aspergillus nidulans: A Model System for Studying Gene Regulation, B. Felenbok, M. Flipphi, and I. Nikolaev. The ROR Nuclear Orphan Receptor Subfamily: Critical Regulators of Multiple Biological Processes, A.M. Jetten, S. Kurebayashi, and E. Ueda. PDE4 cAMP-Specific Phosphodiesterases, M.D. Houslay. Domain-Domain Communication in Aminoacyl-tRNA Synthetases, R.W. Alexander and P. Schimmel. Index. PRAISE FOR THE SERIES Full of interest not only for the molecular biologist-for whom the numerous references will be invaluable-but will also appeal to a much wider circle of biologists, and in fact to all those who are concerned with the living cell. --BRITISH MEDICAL JOURNAL