Spontaneous and Induced Damage to DNA and Chromatin.- Damage to DNA Caused by Hydrolysis.- Methylation of Cellular DNA by the Carcinogen N-methyl-N-nitrosourea and Removal of Methylpurines - Comparisons of Escherichia coli, Mouse and Human Cells.- On the Use of a Damage-specific DNA Binding Protein to Probe Lesions in DNA.- DNA Chemically Modified by N-Acetoxy-N-2-Acetyl-Amino-Fluorene: Nature of the Adducts and Conformation of the Modified DNA.- Heteroduplex DNA in Bacteriophage Tl after Ionizing Radiation.- Influence of Alkylating Agents on the Structure of the Bacterial Nucleoid.- Nucleosomal Structure of Chromatin: Distribution and Excision of DNA Damage.- Electron-Microscopic Visualization of the AAF Binding Sites to DNA in Core Particles and Trinucleosomes by Means of Specific Antibodies.- Studies of Molecular Events in Isolated Nucleolar Chromatin in Response to Chemicals and Ionizing Radiation.- Mechanisms of DNA Excision Repair.- Base Excision Repair of DNA.- Incision of Pyrimidine Dimer Containing DNA by Small Molecular Weight Enzymes.- The Use of Direct Photoreversal of UV-Irradiated DNA for the Demonstration of Pyrimidine Dimer-DNA Glycosylase Activity.- Enzymatic Studies of Base Excision Repair in cultured Human Fibroblasts and in Escherichia coli.- Mechanism of Action of M. luteus Apurinic/Apyrimidinic Endonucleases.- Properties of Uracil-DNA Glycosylases from M. luteus, E. coli, and Mammalian Cells.- Base Replacement Mechanisms for the Repair of Unnatural and Damaged Bases in DNA.- Excision Repair of Bulky Lesions in the DNA of Mammalian Cells.- Inducible Excision Repair in Escherichia coli.- On the Nature of the Repair Deficiency in E. coliuvrE.- Repair of UV-Damaged DNA Transformed into E. coli.- An Endonucleolytic Activity from M. luteus Directed Towards 8-(2-Hydroxy 2-Propyl)-Purines in DNA.- Mechanisms of Postreplication Repair and Repair by Recombination.- Regulatory and Enzymatic Functions of recA Protein in Recombination and Postreplication Repair.- Haemophilus influenzae Does Not Fit Theories of Post-Replication Repair.- RecA-Mediated Asymmetric Repair of Lethal DNA Lesions in E. coli.- 125I Decay in Microorganisms: A Prokaryotic Model System for Examining the Role of Unrepaired Double-Strand DNA Breaks in Cell Killing.- Protein X Synthesis in Mammalian Cells.- Adaptation to Alkylating Agents.- DNA Methyl Transferase Acting on O6-Methylguanine Residues in Adapted E. coli.- Isolation of Mutants of Escherichia coli with Increased Resistance to Alkylating Agents.- Effect of Rifampicin on N-Methyl-N-Nitrosourea-Induced Mutation Frequency in Escherichia coli.- The Enhanced Repair of O6-Alkylguanine in Mammalian Systems.- DNA Sequencing and Gene Cloning in Studying Mutagenesis and Repair.- The Use of DNA Tumor Viruses as Model Systems for Studying Damage and Repair of Eukaryotic Chromosomes: Analysis of Mutations by DNA Sequencing.- Oligodeoxyribonucleotides as Site-Specific Mutagens.- Cloning of recA+ and lexA+ and Some of Their Mutant Alleles; An Investigation of Their Mutual Interaction.- Perturbation of the SOS Response of Escherichia coli by Plasmids Carrying Truncated recA genes.- Plasmids Carrying the uvrA and uvrC Genes of Escherichia coli K12: Construction and Properties.- Cloning of the uvrC+ Gene from Escherichia coli onto a Plaque-Forming Phage Vector.- DNA Repair Deficiency and Human Disease.- Xeroderma Pigmentosum - A Human Model of Defective DNA Repair.- Correlation of Post-UV Colony-Forming Abilites of Xeroderma Pigmentosum Fibroblasts with DNA Incision Reactions Catalyzed by Cell-Free Extracts.- Effects of Ultraviolet-Irradiation on DNA Ligase Activity of Human Fibroblasts from Normal and Xeroderma Pigmentosum Donors.- Heritable Radiosensitive and DNA Repair-Deficient Disorders in Man.- Studies on the Repair Defects of Ataxia Telangiectasia Cells.- Ataxia Telangiectasia: Studies on DNA Repair Synthesis in Fibroblast Strains.- The Response of Cockayne Syndrome Cells to UV-Irradiation.- Chromosomal Radiosensitivity in Fanconi's Anaemia.- DNA Replication in Normal and Damaged Cells.- DNA Replication in Mammalian Cells Damaged by Mutagens.- Replication Processes in Chinese Hamster Cells Treated with Mutagenic Agents: Effects of Split Dose Treatments.- Role of Mammalian DNA Polymerases in Replication and Repair.- Evidence for a Role of DNA Helicase II in DNA Replication.- DNA Replication in Cells with Polytene Chromosomes.- Accuracy of DNA Replication: Effects of Lesions in the Template.- Accuracy and Ageing.- High Fidelity Devices in the Reproduction of DNA.- Inhibition or Absence of DNA Proofreading Exonuclease Is Not Sufficient to Allow Copying of Pyrimidine Dimers.- On the Possible Role of the Miscoding DNA-Lesions, l,N6-Ethenoadenine and 3,N4-Ethenocytosine, in Vinyl Chloride-Induced Mutagenesis and Carcinogenesis.- The Function of Methylated Bases in DNA of Escherichia coli.- Role of ADP-Ribose in DNA Repair.- (ADP-Ribose)n, a New Component in DNA Repair.- Addition of UV Endonuclease to Permeable XP Cells to Analyze the Relation of Poly(ADPR) Synthesis to DNA Repair.- Alkylation of Ehrlich Ascites Tumor Cells Elicits a Response from Poly(ADP-Ribose) Polymerase.- Lethal and Mutagenic Effects of DNA Damage.- Programmed Death of Escherichia coli after UV Radiation.- Excision Repair Affects the Specificity of UV-Mutagenesis in the lacI+ Gene of Escherichia coli: Possible Involvement of Secondary DNA Structure.- Hydrazine and Methylhydrazine as recA+ Independent Mutagens in Escherichia coli.- Effects of Platinum Coordination Complexes on Mutants of Escherichia coli Defective in DNA Repair and Genetic Recombination.- DNA Replication, Repair, and Mutagenesis in Permeable E. coli Cells that Are Fully Viable.- Involvement of ATP in Repair and Mutagenesis of X-Irradiated Mammalian Cells.- Cell Cycle Patterns of Mutation Induction and Their Relationship to DNA Repair.- Yeast as a Model for Studying DNA-Alterations and Biological Response Induced by Alkylating Anti-Cancer Drugs: Effects of Cyclophosphamide.- Induction of Sister Chromatid Exchanges.- Is Sister Chromatid Exchange Formation an Inducible Process?.- Induction of Sister Chromatid Exchanges by Non-Mutagenic Carcinogens.- Chromosome Aberrations and Sister Chromatid Exchanges in Persons Occupationally Exposed to Mutagens/Carcinogens.- Sister-Chromatid Exchanges as a Measure of Damage Produced by Visible Light on BrdUrd-Substituted Chromosomes.- DNA Damage and Repair in Relation to Carcinogenesis.- DNA Damage and Carcinogenesis.- Some Parameters Affecting DNA Damage and Their Relevance to the Action of Chemical Carcinogens.- Effect of a Tumor Promoter on DNA Repair after Treatment of C3H/10T1/2 Cells with a Carcinogen.- Enhanced Survival of Ultraviolet-Damaged Parvovirus LuIII and Herpes Virus in Carcinogen Pretreated Transformed Human Cells.- Author index.