1. Regulation of expression of photosynthesis genes in anoxygenic photosynthetic bacteria

   • Gabriele Klug

   Minireview Pages: 397 - 404

2. Three nitrate reductase activities in Alcaligenes eutrophus

   • Ute Warnecke-Eberz
   • Bärbel Friedrich

   Original Papers Pages: 405 - 409

3. Anaerobic expression of nitric oxide reductase from denitrifying Pseudomonas stutzeri

   • H. Körner

   Original Papers Pages: 410 - 416

4. Ultrastructural localization of cellular compartments involved in secretion of the low molecular weight, alkaline xylanase by Trichoderma reesei

   • W. Kurzątkowski
   • J. Solecka
   • C. P. Kubicek

   Original Papers Pages: 417 - 422

5. Upper temperature limits for growth and diazotrophy in the thermophilic cyanobacterium HTF Chlorogloeopsis

   • Jens Kirk Thomsen
   • Raymond P. Cox

   Original Papers Pages: 423 - 427

6. The elemental composition dynamics of large polyphosphate granules in Acinetobacter strain 210A

   • C. F. C. Bonting
   • G. J. J. Kortstee
   • Alexander J. B. Zehnder

   Original Papers Pages: 428 - 434

7. Plasma membrane lipid composition of the halophilic cyanobacterium Aphanothece halophytica

   • Darryl Ritter
   • John H. Yopp

   Original Papers Pages: 435 - 439

8. Utilization of sulfonates as sole sulfur source by soil bacteria including Comamonas acidovorans

   • Angelica P. Seitz
   • Edward R. Leadbetter
   • Walter Godchaux III

   Original Papers Pages: 440 - 444

9. Isolation and chemical characterization of lipopolysaccharides from four Mycoplana species (M. bullata, M. segnis, M. ramosa and M. dimorpha)

   • Rudrapatnam N. Tharanathan
   • Akira Yokota
   • Hubert Mayer

   Original Papers Pages: 445 - 452

10. Competition for limiting amounts of oxygen between Nitrosomonas europaea and Nitrobacter winogradskyi grown in mixed continuous cultures

    • Hendrikus J. Laanbroek
    • Saskia Gerards

    Original Papers Pages: 453 - 459

11. Thermoanaerobium acetigenum spec. nov., a new anaerobic, extremely thermophilic, xylanolytic non-spore-forming bacterium isolated from an Icelandic hot spring

    • Peter Nielsen
    • Indra M. Mathrani
    • Birgitte K. Ahring

    Original Papers Pages: 460 - 464

12. Pentose utilization and transport by the ruminal bacterium Prevotella ruminicola

    • Herbert J. Strobel

    Original Papers Pages: 465 - 471

13. Caldopentamine and caldohexamine in cells of Thermotoga species, a possible adaptation to the growth at high temperatures

    • Gerhard Zellner
    • Helmut Kneifel

    Original Papers Pages: 472 - 476

14. Regulation of anaerobic respiratory pathways in Wolinella succinogenes by the presence of electron acceptors

    • J. P. Lorenzen
    • A. Kröger
    • G. Unden

    Original Papers Pages: 477 - 483

15. ³¹P Nuclear magnetic resonance studies of ethanol inhibition in Zymomonas mobilis

    • Joachim Strohhäcker
    • Albert A. de Graaf
    • Hermann Sahm

    Original Papers Pages: 484 - 490