1. As the Conference Opens.- 2. Sequence Organization in Animal DNA's.- 3. DNA Replication in the Chromosomes of Eukaryotes.- 4. The Mechanism of Gene Amplification in Xenopus laevis Öocytes.- 5. Repetitive DNA in Drosophila.- 6. Evolution of 9S mRNA Sequences.- 7. A New Approach to the Study of Nucleotide Sequences in DNA's.- 8. On the Structure of Pre-mRNA and the Transcriptional Unit in Eukaryotes.- 9. Purification of Individual Histone mRNA's and Evolution of Their Sequences and Sizes.- 10. Reiteration of DNA Coding for Collagen Messenger RNA.- 11. On the Role of Poly A Sequences in mRNA Metabolism.- 12. Nonhistone Proteins of the Newt Germinal Vesicle.- 13. The Giant RNA Transcript in a Balbiani Ring of Chironomus tentans.- 14. Studies on the Template Specificities of Eukaryotic DNA-Dependent RNA Polymerases in vitro.- 15. Genetic Autonomy of Mitochondrial DNA.- 16. Involvement of RNA in the Process of Puff Induction in Polytene Chromosomes.- 17. Stimulation of RNA Polymerase III by Histones and Other Polycations.- 18. A Transcription Complex from Chloroplasts of Euglena gracilis.- 19. Studies on the Replication of DNA.- 20. Regulation of Bacterial Genes.- 21. Host-Dependent Gene Expression of Bacteriophages T3 and T7.- 22. Synthesis of RNA Primer for Lambda DNA Replication Is Controlled by Phage and Host.- 23. Interaction in DNA Replication of the Gene 32 and rll Products of Phage T4 with the dna C product of the Host.- 24. Some Considerations Regarding the Structure and Function of Promoter-Operator Regions.- 25. Structure of Sigma-Dependent Binding Sites of E. coli RNA Polymerase to Phages ?, T5 and T7 DNA's.- 26. Genetic Regulation of Quinate-Shikimate Catabolism in Neurospora crassa.- 27. Ultrastructural Aspects of Genetic Activity.- 28. Molecular Cytogenetics; A Symposium Summary.
This volume represents the Proceedings of the Twenty-Sixth Annual Biology Division Research Conference held April 9-12, 1973 in Gatlinburg, Tennessee. The subject of the symposium was Molecular Cytogenetics and the aim of the meeting was to bring together researchers interested in problems of chromosome organi zation, activity and regulation in prokaryotes and eukaryotes. Cytological, biochemical and genetic approaches to these questions were included since the collective information gained from these disciplines provides an integrated approach to genome structure and function. The meeting was sponsored by the Biology Division of the Oak Ridge National Laboratory*. It would not have been possible with out the interest and cooperation of the organizing committee under the chairmanship of O. L. Miller, Jr. Special thanks are due to the chairmen and speakers for making this volume possible and to Dr. Waldo Cohn for his assistance in editing. Preparation of the completed volume was due in large part to the efforts of Sandra Vaughan of the Biology Division. The Editors Barbara Ann Hamkalo John Papaconstantinou August, 1973 * Operated by the Union Carbide Corporation for the U.S. Atomic Energy Commission.
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