coxtp:xts 



Chaplcr III 



The ()r<i;aiiizati()ii of DNA in Bactcriojjliage and Bacteria 

 Charles A. Thomas, Jr. 



I. Bacteriophage DNA 113 



II. Bacterial DNA 141 



Acknowledgments 148 



References 148 



Chapler IV 



Cellular Control of DNA Biosvnthesis 



Karl G. Lark 



I. Introduction 153 



II. The Role of DNA Precursons in Controlling DNA Synthesis ... 162 



III. Role of Protein or RNA Synthesis in Controlling DNA Synthe.sis . . 173 



IV. The Physical State of DNA as a Factor Controlling its Replication . 180 

 V. Other Factors Affecting DNA Biosynthesis and the DNA Cycle . . 190 



VI. Summary, Conclusion, an<l Opinions 197 



Acknowledgments 200 



References 200 



Chapter V 



Molecular Mechanism of Mutations 



Ernst Freese 



I. Introduction 207 



II. Structure, Dui)licati<)n, and Alteration of tlie Hereditary Material . . 215 



III. Biochemistry of Mutagens and Theory of Base Alterations . . . 217 



IV. The Extent of Point Mutations 248 



V. Mutagenic Specificity 252 



References 264 



