1. IUMS news

   News Pages: i - iv

2. Vibrio cholerae in disguise—a disturbing entity

   • G. B. Nair
   • Y. Takeda

   Editorial Pages: 399 - 400

3. Introduction: A simple expression? Complexities of genetic regulation in microorganisms

   • M. Vicente

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 401 - 402

4. Bacterial RNA polymerases: structural and functional relationships

   • R. E. Glass
   • R. S. Hayward

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 403 - 413

5. Gearbox gene expression and growth rate

   • M. Aldea
   • T. Garrido
   • A. Tormo

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 414 - 420

6. Post-transcriptional control of gene expression: bacterial mRNA degradation

   • C. M. Arraiano

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 421 - 432

7. Gene expression in Pseudomonas

   • J. L. Ramos
   • S. Marqués

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 433 - 443

8. Control of the expression of bacterial genes involved in symbiotic nitrogen fixation

   • M. Megías
   • J. L. Folch
   • C. Sousa

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 444 - 454

9. Expression of bacterial genes involved in maltose metabolism

   • A. Puyet

   Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 455 - 460

10. Expression of fungal genes involved in penicllin biosynthesis

    • M. A. Peñalva
    • E. Espeso
    • H. Martínez-Blanco

    Special Topic Review: Control of Gene Expression Microorganisms. Edited by Miguel Vicente Pages: 461 - 467

11. Chitinolytic enzymes: their contribution to basic and applied research

    • S. A. Shaikh
    • M. V. Deshpande

    Review Pages: 468 - 475

12. β-Xylanase production by Aureobasidium pullulans grown on sugars agricultural residues

    • M. Karni
    • R. L. Deopurkar
    • V. B. Rale

    Research Paper Pages: 476 - 478

13. Interaction of dichloromethane (methylene chloride) with the nitrous oxide reductase from Wolinella succinogenes

    • Chunqing Zhang
    • Thomas C. Hollocher

    Research Paper Pages: 479 - 482

14. Degradation of nitriles and amides by the immobilized cells of Pseudomonas putida

    • K. D. Chapatwala
    • E. M. Hall
    • G. R. V. Babu

    Research Paper Pages: 483 - 486

15. Meeting announcements

    Events Pages: 487 - 488