1. Cytochrome-c reductases from wild-type and mutant strains of Aspergillus nidulans

   • D. W. MacDonald
   • D. J. Cove
   • A. Coddington

   OriginalPaper Pages: 187 - 199

2. Interaction between an R factor and an element conferring resistance to mercuric ions in Pseudomonas aeruginosa

   • Vilma A. Stanisich

   OriginalPaper Pages: 201 - 212

3. Identification of the structural gene of levansucrase in Bacillus subtilis Marburg

   • J. -A. Lepesant
   • J. Lepesant-Kejzlarová
   • R. Dedonder

   OriginalPaper Pages: 213 - 221

4. Direct assay for sigma factor activity and demonstration of the loss of this activity during sporulation in Bacillus subtilis

   • Jean Brevet

   OriginalPaper Pages: 223 - 231

5. X-ray induced mitotic recombination in Drosophila melanogaster

   • Jutta Haendle

   OriginalPaper Pages: 233 - 239

6. The ribosomal proteins of Drosophila melanogaster

   • Andrew G. Lambertsson

   OriginalPaper Pages: 241 - 247

7. Characterization of conditional lethal mutants of bacteriophage P2

   • Gunnar Lindahl

   OriginalPaper Pages: 249 - 260

8. Biochemical genetics of bacterial sporulation

   • J. C. F. Sousa
   • M. T. Silva
   • G. Balassa

   OriginalPaper Pages: 261 - 272

9. lemon—eine weitere Augenfarbmutante bei der Schmeißfliege Calliphora erythrocephala

   • F. -H. Ullerich
   • H. Langer

   Short Communication Pages: 273 - 276