1. Effect of oxygen on substrate utilization for nitrogen fixation and growth in Frankia spp.

   • Mary F. Lopez
   • Marcia A. Murry
   • John G. Torrey

   Original Papers Pages: 209 - 214

2. Production, by filamentous, nitrogen-fixing cyanobacteria, of a bacteriocin and of other antibiotics that kill related strains

   • Enrique Flores
   • C. Peter Wolk

   Original Papers Pages: 215 - 219

3. The production and release of an extracellular polysaccharide during starvation of a marine Pseudomonas sp. and the effect thereof on adhesion

   • Michael Wrangstadh
   • Patricia L. Conway
   • Staffan Kjelleberg

   Original Papers Pages: 220 - 227

4. Construction of a gene bank and identification of the ribulose bisphosphate carboxylase/oxygenase genes from the nutritionally versatile cyanobacterium Chlorogloeopsis fritschii

   • D. Vakeria
   • G. A. Codd
   • W. D. P. Stewart

   Original Papers Pages: 228 - 233

5. Antibiotic tetaine — a selective inhibitor of chitin and mannoprotein biosynthesis in Candida albicans

   • Slawomir Milewski
   • Henryk Chmara
   • Edward Borowski

   Original Papers Pages: 234 - 240

6. Isolation of cyanobacterial heterocysts with high and sustained dinitrogen-fixation capacity supported by endogenous reductants

   • Bent Borg Jensen
   • Raymond P. Cox
   • Robert H. Burris

   Original Papers Pages: 241 - 247

7. Characterization of two strains of Pelobacter carbinolicus isolated from anaerobic digesters

   • Henri-Charles Dubourguier
   • Eric Samain
   • Guy Albagnac

   Original Papers Pages: 248 - 253

8. Chemical analyses on cell envelope polymers of the halophilic, phototrophic Rhodospirillum salexigens

   • D. Evers
   • J. Weckesser
   • U. J. Jürgens

   Original Papers Pages: 254 - 258

9. Growth characteristics of non-heterocystous cyanobacterium Plectonema boryanum with N₂ as nitrogen source

   • Dieter Giani
   • Wolfgang E. Krumbein

   Original Papers Pages: 259 - 265

10. The disappearance of isocitrate lyase from the green alga Chlorella fusca studied by immunoprecipitation

    • Lucy F. Henley
    • Christopher F. Thurston

    Original Papers Pages: 266 - 271

11. Utilization of l-alanine as carbon and nitrogen source by Deusulfovibrio HL21

    • Alfons J. M. Stams
    • Leo G. Hoekstra
    • Theo A. Hansen

    Original Papers Pages: 272 - 276

12. Metabolism of l-alanine in Desulfotomaculum ruminis and two marine Desulfovibrio strains

    • Alfons J. M. Stams
    • Theo A. Hansen

    Original Papers Pages: 277 - 279

13. Enzymes of the autotrophic pathway in mating partners and transconjugants of Nocardia opaca 1 b and Rhodococcus erythropolis

    • Christa Ecker
    • Michael Reh
    • Hans-G. Schlegel

    Original Papers Pages: 280 - 286

14. Degradation of the nitrogenase proteins during encystment of Azotobacter vinelandii

    • Werner Kössler
    • Diethelm Kleiner

    Original Papers Pages: 287 - 289

15. Properties of a germination mutant of Phycomyces blakesleeanus

    • André J. Van Laere
    • Francisco Rivero

    Original Papers Pages: 290 - 294

16. Noncyclic electron transport in chromatophores from photolithotrophically grown Rhodobacter sulfidophilus

    • Daniel C. Brune
    • Hans G. Trüper

    Original Papers Pages: 295 - 301

17. Erratum

    Erratum Pages: 302 - 302