1. Distribution of the ability for citrate utilization amongst Clostridia

   • G. Antranikian
   • C. Friese
   • G. Gottschalk

   Original Papers Pages: 179 - 182

2. Molecular analysis of inorganic nitrogen assimilation in yeasts

   • Prabhakara V. Choudary
   • G. Ramananda Rao

   Original Papers Pages: 183 - 186

3. Aromatic metabolism in Rhizobium trifolii —protocatechuate 3,4-dioxygenase

   • Y. P. Chen
   • M. J. Dilworth
   • A. R. Glenn

   Original Papers Pages: 187 - 190

4. Expression of surface hydrophobicity encoded by R-plasmids in Escherichia coli laboratory strains

   • C. M. Ferreirós
   • M. T. Criado

   Original Papers Pages: 191 - 194

5. Respiratory energy transduction by membrane fragments of the phytopathogenic bacteria Pseudomonas cichorii and Pseudomonas aptata

   • D. Zannoni

   Original Papers Pages: 195 - 199

6. Cell wall studies on budding bacteria of the Planctomyces/Pasteuria group and on a Prosthecomicrobium sp.

   • E. König
   • H. Schlesner
   • P. Hirsch

   Original Papers Pages: 200 - 205

7. Denitrification by Azospirillum brasilense Sp 7

   • W. Zimmer
   • M. Penteado Stephan
   • H. Bothe

   Original Papers Pages: 206 - 211

8. Denitrification by Azospirillum brasilense Sp 7

   • M. Penteado Stephan
   • W. Zimmer
   • H. Bothe

   Original Papers Pages: 212 - 216

9. Endogenous ammonia production by Anacystis nidulans R-2 induced by methionine sulfoximine

   • Samy Boussiba
   • X. -Q. Liu
   • Jane Gibson

   Original Papers Pages: 217 - 219

10. Flagellar tip activation in vis-à-vis pairs of Chlamydomonas eugametos

    • K. J. Crabbendam
    • N. Nanninga
    • H. van den Ende

    Original Papers Pages: 220 - 223

11. Acetate synthesis from 2 CO₂ in acetogenic bacteria: is carbon monoxide an intermediate?

    • Gabriele Diekert
    • Maria Hansch
    • Ralf Conrad

    Original Papers Pages: 224 - 228

12. Fine structure of the knobby spore type of Streptomyces torulosus

    • Gernot Vobis
    • Christa Zimmermann

    Original Papers Pages: 229 - 232

13. Depression of the synthesis of the intermediate and large forms of ribulose-1,5-bisphosphate carboxylase/oxygenase in Rhodopseudomonas capsulata

    • Jessup M. Shively
    • Edgar Davidson
    • Barry L. Marrs

    Original Papers Pages: 233 - 236

14. Ultra-violet mutagenesis of Synechocystis sp. 6701: mutations in chromatic adaptation and phycobilisome assembly

    • Lamont K. Anderson
    • M. Carmen Rayner
    • Frederick A. Eiserling

    Original Papers Pages: 237 - 243

15. Growth and macromolecular composition of Anacystis nidulans at different temperatures in Mg²⁺- and K⁺-limited chemostats

    • Hans C. Utkilen

    Original Papers Pages: 244 - 246

16. Photosynthesis and plasmamembrane permeability properties of Prochloron

    • Christa Critchley
    • T. John Andrews

    Original Papers Pages: 247 - 250

17. Rhodospirillum salinarum sp. nov., a halophilic photosynthetic bacterium isolated from a Portuguese saltern

    • Hilde Nissen
    • Ian D. Dundas

    Original Papers Pages: 251 - 256

18. Carbon assimilation pathways in sulfate reducing bacteria. Formate, carbon dioxide, carbon monoxide, and acetate assimilation by Desulfovibrio baarsii

    • Kathrin Jansen
    • Rudolf K. Thauer
    • Georg Fuchs

    Original Papers Pages: 257 - 262

19. Non-aceticlastic methanogenesis from acetate: acetate oxidation by a thermophilic syntrophic coculture

    • Stephen H. Zinder
    • Markus Koch

    Original Papers Pages: 263 - 272

20. Site of action of the natural algicide, cyanobacterin, in the blue-green alga, Synechococcus sp.

    • Florence K. Gleason
    • Joy L. Paulson

    Original Papers Pages: 273 - 277

21. The effect of pH on the transformation of syringic and vanillic acidsby the laccases of Rhizoctonia praticola and Trametes versicolor

    • A. Leonowicz
    • R. U. Edgehill
    • J. -M. Bollag

    Erratum Pages: 278 - 278