1. Heterochromatin of the Drosophila melanogaster Y chromosome as modifier of position effect variegation: The time of its action

   • Hans Joachim Becker
   • Wilfried Janning

   OriginalPaper Pages: 111 - 114

2. Mutagenic DNA repair in Escherichia coli

   • B. A. Bridges

   OriginalPaper Pages: 115 - 120

3. Detection of messenger RNA from the isoleucine-valine operons of Salmonella typhimurium by heterologous DNA-RNA hybridization: Involvement of transfer RNA in transcriptional repression

   • Geoffrey Childs
   • Frank Sonnenberg
   • Martin Freundlich

   OriginalPaper Pages: 121 - 126

4. Biogenesis of mitochondria 48

   • D. J. Groot Obbink
   • T. W. Spithill
   • Anthony W. Linnane

   OriginalPaper Pages: 127 - 136

5. The influence of the reading context upon the suppression of nonsense codons

   • Michele M. Fluck
   • Winston Salser
   • Richard H. Epstein

   OriginalPaper Pages: 137 - 149

6. The transposon Tn1 as a probe for studying ColE1 structure and function

   • Gordon Dougan
   • David Sherratt

   OriginalPaper Pages: 151 - 160

7. Studies on the bipolar argECBH operon of E. coli: Characterization of restriction endonuclease fragments obtained from λdargECBH transducing phages and a ColE1 argECBH plasmid

   • M. Crabeel
   • D. Charlier
   • W. K. Maas

   OriginalPaper Pages: 161 - 168

8. Kinetics of Mu DNA synthesis

   • Carel Wijffelman
   • Bep Lotterman

   OriginalPaper Pages: 169 - 174

9. Rapid screening for plasmid DNA

   • Colin Hughes
   • G. G. Meynell

   OriginalPaper Pages: 175 - 179

10. Analysis of the phase variation in lambda reduced immunity lysogens

    • Josef Schneider
    • Hans B. Strack

    OriginalPaper Pages: 181 - 187

11. Dominant and recessive informational suppressors of a missense mutation in Coprinus

    • Heather M. Sealy-Lewis
    • Lorna A. Casselton

    OriginalPaper Pages: 189 - 195

12. Complementation of transfer deficient ColE1 mutants

    • Gareth Warren
    • David Sherratt

    OriginalPaper Pages: 197 - 201

13. Transformation in Bacillus subtilis

    • Johannes Buitenwerf
    • Gerard Venema

    OriginalPaper Pages: 203 - 213

14. Altered dihydrofolate reductase in fol regulatory mutants of Escherichia coli K12

    • Robert Sheldon

    OriginalPaper Pages: 215 - 219

15. Ammonia assimilation and nitrogen fixation in Rhizobium meliloti

    • A. Kondorosi
    • Z. Svab
    • R. A. Dixon

    OriginalPaper Pages: 221 - 226