1. Two kinds of insertions in bacterial genes

   • Heinz-Josef Hirsch
   • Peter Starlinger
   • Philippe Brachet

   OriginalPaper Pages: 191 - 206

2. Electron microscopy of polar insertions in the lac operon of Escherichia coli

   • M. H. Malamy
   • M. Fiandt
   • W. Szybalski

   OriginalPaper Pages: 207 - 222

3. Polar mutations in lac, gal and phage λ consist of a few IS-DNA sequences inserted with either orientation

   • M. Fiandt
   • W. Szybalski
   • M. H. Malamy

   OriginalPaper Pages: 223 - 231

4. Stoichiometric measurements of 30S and 50S ribosomal proteins from Escherichia coli

   • H. J. Weber

   OriginalPaper Pages: 233 - 248

5. Heterogeneity of ribosomal populations in Escherichia coli cells grown in different media

   • Ellen Deusser

   OriginalPaper Pages: 249 - 258

6. Properties of a temperature sensitive plasmid in Citrobacter freundii

   • J. de Graaff
   • A. H. Stouthamer

   OriginalPaper Pages: 259 - 266

7. Histidine starvation and completion of the bacterial deoxyribonucleic acid replication cycle

   • A. B. Stone

   OriginalPaper Pages: 267 - 276

8. Properties of the interaction of ribosomal protein S4 and 16S RNA in Escherichia coli revertants from streptomycin dependence to independence

   • L. Daya-Grosjean
   • R. A. Garrett
   • H. G. Wittmann

   OriginalPaper Pages: 277 - 286