1. Mutational and kinetic analysis of basic amino acid transport in the cyanobacterium Synechocystis sp. PCC 6803

   • Enrique Flores
   • Alicia M. Muro-Pastor

   Original Papers Pages: 521 - 527

2. Complementation of a pleiotropic Nif-Gln regulatory mutant of Rhodospirillum rubrum by a previously unrecognized Azotobacter vinelandii regulatory locus

   • Chang-Zhang Hu
   • Duane C. Yoch

   Original Papers Pages: 528 - 535

3. Electron transport chain of Zymomonas mobilis

   • Michael Strohdeicher
   • Burkard Neuß
   • Hermann Sahm

   Original Papers Pages: 536 - 543

4. Genetic mapping and biochemical analysis of mutants in the maltose regulatory gene of the MAL1 locus of Saccharomyces cerevisiae

   • Michael J. Goldenthal
   • Marco Vanoni

   Original Papers Pages: 544 - 549

5. New motile anaerobic bacteria growing by succinate decarboxylation to propionate

   • Karin Denger
   • Bernhard Schink

   Original Papers Pages: 550 - 555

6. Thermoproteus uzoniensis sp. nov., a new extremely thermophilic archaebacterium from Kamchatka continental hot springs

   • E. A. Bonch-Osmolovskaya
   • M. L. Miroshnichenko
   • G. A. Zavarzin

   Original Papers Pages: 556 - 559

7. Characterization of a plasmid involved with cointegrate formation and lactose metabolism in Lactococcus lactis subsp. lactis OZS1

   • Adam J. Smigielski

   Original Papers Pages: 560 - 565

8. Reactions of direct formaldehyde oxidation to CO₂ are non-essential for energy supply of yeast methylotrophic growth

   • A. A. Sibirny
   • V. M. Ubiyvovk
   • K. M. Bliznik

   Original Papers Pages: 566 - 575

9. Energetics of mixotrophic and autotrophic C₁-metabolism by Thiobacillus acidophilus

   • J. T. Pronk
   • P. de Bruijn
   • J. G. Kuenen

   Original Papers Pages: 576 - 583

10. Phosphate accumulation and the occurrence of polyphosphates and cyclic 2,3-diphosphoglycerate in Methanosarcina frisia

    • Heike Rudnick
    • Sven Hendrich
    • Karl-Heinz Blotevogel

    Original Papers Pages: 584 - 588

11. Sambhar Salt Lake

    • Vivek Upasani
    • Suresh Desai

    Original Papers Pages: 589 - 593

12. Isolate B12, which harbours a virus-like element, represents a new species of the archaebacterial genus Sulfolobus, Sulfolobus shibatae, sp. nov.

    • Dennis Grogan
    • Peter Palm
    • Wolfram Zillig

    Original Papers Pages: 594 - 599

13. (+)-4-Carboxymethyl-2,4-dimethylbut-2-en-4-olide as dead-end metabolite of 2,4-dimethylphenoxyacetic acid or 2,4-dimethylphenol by Alcaligenes eutrophus JMP 134

    • D. H. Pieper
    • K. H. Engesser
    • H. -J. Knackmuss

    Original Papers Pages: 600 - 604

14. Purification and characterization of the molybdoenzymes nicotinate dehydrogenase and 6-hydroxynicotinate dehydrogenase from Bacillus niacini

    • Matthias Nagel
    • Jan R. Andreesen

    Original Papers Pages: 605 - 613

15. Cellular localization of cytochrome c ₅₅₃ in the N₂-fixing cyanobacterium Anabaena variabilis

    • Aurelio Serrano
    • Patricia Giménez
    • Peter Böger

    Original Papers Pages: 614 - 618