1. Mutagenicity of dimethylnitrosamine and diethylnitrosamine for Saccharomyces in an in vitro hydroxylation system

   • V. W. Mayer

   OriginalPaper Pages: 289 - 294

2. A system selective for yeast mutants deficient in meiotic recombination

   • Robert Roth
   • Seymour Fogel

   OriginalPaper Pages: 295 - 305

3. Allelic modulation in Paramecium aurelia heterozygotes

   • Yvonne Capdeville

   OriginalPaper Pages: 306 - 316

4. Genetic control of maltase formation in yeast

   • N. A. Khan
   • N. R. Eaton

   OriginalPaper Pages: 317 - 322

5. Further studies on the deoxyribonucleic acid helping effect during transformation

   • Kuo-Chun Chen

   OriginalPaper Pages: 323 - 340

6. Studies on the genetic control of tryptophan pyrrolase in Drosophila Melanogaster

   • David L. Baillie
   • Arthur Chovnick

   OriginalPaper Pages: 341 - 353

7. Fine structure of the ura 2 locus in Saccharomyces cerevisiae

   • Michèle Denis-Duphil
   • François Lacroute

   OriginalPaper Pages: 354 - 364