Cleavage-Site Motifs in Protein Targeting Sequences.- Complications of RNA Heterogeneity for the Engineering of Virus Vaccines and Antiviral Agents.- The Quaternary Structures of SV40 Large T Antigen and Tumor Suppressor P53: Analysis by Gel Electrophoresis.- Assembly of Antibodies and Mutagenized Variants in Transgenic Plants and Plant Cell Cultures.- Maize Endosperm Tissue as an Endoreduplication System.- Study of Chlorate-Resistant Mutants of Arabidopsis: Insights into Nitrate Assimilation and Ion Metabolism of Plants.- Approaches and Progress in the Molecular Cloning of Plant Disease Resistance Genes.- Is GRP78 a Sensor of Cellular Secretory Activity?.- The Molecular Biology of Pathogenesis In ustilago Maydis.- Molecular Design of Oligomeric Channel Proteins.- Regulation of Gene Expression by Thyroid Hormones and Retinoic Acid.- RNA trans- splicing.- Structural Constraints on Residue Substitution.- Molecular and Functional Analysis of the A Mating Type Genes of Coprinus Cinereus.- Physical Mapping Of Human Chromosomes.