and Historical Background.- Cloning if Double-Stranded cdna.- Gene Enrichment.- Transformation of Mammalian Cells.- Constructed Mutants of Simian Virus 40.- Structure of Cloned Genes from Xenopus: a Review.- Transformation of Yeast.- The Use of Site-Directed Mutagenesis in Reversed Genetics.- Agrobacterium Tumor Inducing Plasmids: Potential Vectors for the Genetic Engineering of Plants.- The Chloroplast, its Genome and Possibilities for Genetically Manipulating Plants.- Mitochondrial Dna of Higher Plants and Genetic Engineering.- Host-Vector Systems for Genetic Engineering of Higher Plant Cells.- Soybean Urease-Potential Genetic Manipulation of Agronomic Importance.- Acknowledgments.Springer Book Archives