1. Ultraviolet light-induced mutation in UV-resistant, thermosensitive derivatives of lexA ⁻ strains of Escherichia coli K-12

   • David W. Mount
   • Candace Kosel

   OriginalPaper Pages: 95 - 106

2. Deletions in bacteriophage P2. Circularity of the genetic map and its orientation relative to the DNA denaturation map

   • G. Bertani

   OriginalPaper Pages: 107 - 137

3. Physical mapping of bacteriophage P2 mutations and their relation to the genetic map

   • D. K. Chattoraj
   • H. B. Younghusband
   • R. B. Inman

   OriginalPaper Pages: 139 - 149

4. DNA nucleotide sequence homologies between some zoosporic fungi

   • M. Ojha
   • S. K. Dutta
   • G. Turian

   OriginalPaper Pages: 151 - 165

5. Bacterial mutants able to partly suppress the effect of N mutations in bacteriophage λ

   • Françoise Brunel
   • John Davison

   OriginalPaper Pages: 167 - 180

6. The nature of the product of the cys B gene of Escherichia coli

   • Michael Tully
   • M. D. Yudkin

   Short Communication Pages: 181 - 183