1. Genetic analysis of lon mutants of strain K-12 of Escherichia coli

   • John Donch
   • Joseph Greenberg

   OriginalPaper Pages: 105 - 115

2. Thermal responses of mutant enzymes and temperature limits to growth

   • J. Langridge

   OriginalPaper Pages: 116 - 126

3. Transduction of nitrate reductase loci of Escherichia coli by phages Pl and λ

   • W. A. Venables
   • J. R. Guest

   OriginalPaper Pages: 127 - 140

4. Mechanism for polarized recombination in Streptomyces

   • G. Sermonti
   • A. Carere

   OriginalPaper Pages: 141 - 149

5. Optical investigations on double stranded ribonucleic acid from turnip yellow mosaic virus

   • W. Guschlbauer
   • Yves Courtois
   • J. M. Bové

   OriginalPaper Pages: 150 - 158

6. Inactivation and reversion of multisite streptomycin resistance mutations of Pneumococcus

   • Minna B. Rotheim
   • Arnold W. Ravin

   OriginalPaper Pages: 159 - 175

7. An hypothesis and evidence concerning the genetic components controlling tumor formation in Nicotiana

   • M. R. Ahuja

   OriginalPaper Pages: 176 - 184

8. Organization of the Histidine-3 region of Neurospora

   • Asad Ahmed

   OriginalPaper Pages: 185 - 193

9. Temperature sensitive mutations affecting RNA synthesis in Escherichia coli

   • R. B. Khesin
   • S. Z. Mindlin
   • T. S. Ilyina

   OriginalPaper Pages: 194 - 208