1. Alterations in mitochondrial DNA of yeast which accompany genetically and environmentally controlled changes inρ ⁻ mutabilitymutability

   • C. V. Lusena
   • A. P. James

   OriginalPaper Pages: 119 - 125

2. Deletions of ribosomal protein genes inEscherichia coli merodiploids heterozygous for resistance to streptomycin and spectinomycin

   • Ólafur S. Andrésson
   • Ragnheiôur Á. Magnúsdóttir
   • Guômundur Eggertsson

   OriginalPaper Pages: 127 - 130

3. The effect of dose and time on the induction of genetic alterations insaccharomyces cerevisiae by aminoacridines in the presence and absence of visible light irradiation in comparison with the dose-effect-curves of mutagens with other type of action

   • Rudolf Fahrig

   OriginalPaper Pages: 131 - 140

4. Detection of ribonucleic acids which are larger than 30S precursor ribosomal RNA in RNase III deficientE. coli cells

   • Atsushi Yuki

   OriginalPaper Pages: 141 - 150

5. An approach to genetic transformation in the Xiphophorine fish

   • M. Schwab
   • J. Vielkind
   • F. Anders

   OriginalPaper Pages: 151 - 158

6. Mutants of the Clo DF13 plasmid inEscherichia coli with a decreased bacteriocinogenic activity

   • P. M. Andreoli
   • H. J. J. Nijkamp

   OriginalPaper Pages: 159 - 170

7. Somatic hybridization experiments in solanaceous species

   • Horst Binding

   OriginalPaper Pages: 171 - 175

8. Plasmids controlling synthesis of hemolysin inEscherichia coli

   • Brigitte Royer-Pokora
   • Werner Goebel

   OriginalPaper Pages: 177 - 183

9. Consequences of losing ribonuclease III on theEscherichia coli cell

   • David Apirion
   • Jeff Neil
   • Ned Watson

   OriginalPaper Pages: 185 - 190

10. Regulation of proteolytic enzymes inPodospora anserina: Selection and properties of self-lysing mutant strains

    • Yvonne M. Delettre
    • Jean Bernet

    OriginalPaper Pages: 191 - 197

11. Site c27 in phage P22 and control of the pathway to lysogeny

    • Shin-ichi Tokuno
    • Michael Gough

    OriginalPaper Pages: 199 - 204

12. Identification of components of the streptomycin-binding center ofE. coli MRE 600 ribosomes by photo-affinity labelling

    • Alexander S. Girshovich
    • Elena S. Bochkareva
    • Yuri A. Ovchinnikov

    OriginalPaper Pages: 205 - 212

13. Mutational properties ofsupP amber-ochre supersuppressors inSaccharomyces cerevisiae

    • Wayne L. Gerlach

    OriginalPaper Pages: 213 - 215

14. The maintenance affinities of KLF-1 proximal F merogenotes inEscherichia coli

    • Josef Hubáček
    • Hermína Braná

    OriginalPaper Pages: 217 - 221

15. Genetic and biochemical studies of phosphomannose isomerase deficient mutants ofSaccharomyces cerevisiae

    • Luis S. Herrera
    • C. Pascual
    • X. Alvarez

    OriginalPaper Pages: 223 - 230

16. Announcement

    Announcement Pages: CO3 - CO3