1. Identification of DNA topoisomerases involved in immediate and transient DNA relaxation induced by heat shock inEscherichia coli

   • Yasuyuki Ogata
   • Tohru Mizushima
   • Kazuhisa Sekimizu

   Original Paper Pages: 451 - 455

2. Theste13 ⁺ gene encoding a putative RNA helicase is essential for nitrogen starvation-induced G1 arrest and initiation of sexual development in the fission yeastSchizosaccharomyces pombe

   • Hiromi Maekawa
   • Tomoko Nakagawa
   • Chikashi Shimoda

   Original Paper Pages: 456 - 464

3. bHLH proteins encoded by theEnhancer of split complex ofDrosophila negatively interfere with transcriptional activation mediated by proneural genes

   • Nadja Oellers
   • Michaela Dehio
   • Elisabeth Knust

   Original Paper Pages: 465 - 473

4. Mutations in somePolycomb group genes ofDrosophila interfere with regulation of segmentation genes

   • Joanie McKeon
   • Eric Slade
   • Hugh W. Brock

   Original Paper Pages: 474 - 483

5. Preferential transposition of aDrosophila P element to the corresponding region of the homologous chromosome

   • John Tower
   • Raj Kurapati

   Original Paper Pages: 484 - 490

6. Enhanced frequency of transposition of the maize transposable elementActivator following excision from T-DNA inPetunia hybrida

   • Timothy P. Robbins
   • Matthew Jenkin
   • Neal Courtney-Gutterson

   Original Paper Pages: 491 - 500

7. PDR3, a new yeast regulatory gene, is homologous toPDR1 and controls the multidrug resistance phenomenon

   • Thierry Delaveau
   • Agnès Delahodde
   • Claude Jacq

   Original Paper Pages: 501 - 511

8. Linkage analysis of sex determination in the honey bee (Apis mellifera)

   • Greg J. Hunt
   • Robert E. Page Jr.

   Original Paper Pages: 512 - 518

9. The vacuolar compartment is required for sulfur amino acid homeostasis inSaccharomyces cerevisiae

   • Irène Jacquemin-Faure
   • Dominique Thomas
   • Yolande Surdin-Kerjan

   Original Paper Pages: 519 - 529

10. The antidote and autoregulatory functions of the F plasmid CcdA protein: a genetic and biochemical survey

    • Michel André Salmon
    • Laurence Van Melderen
    • Martine Couturier

    Original Paper Pages: 530 - 538

11. ThePenicillium chrysogenum andAspergillus nidulans wetA developmental regulatory genes are functionally equivalent

    • Rolf A. Prade
    • William E. Timberlake

    Original Paper Pages: 539 - 547

12. Differential expression of several E2-type ubiquitin carrier protein genes at different developmental stages inArabidopsis thaliana andNicotiana sylvestris

    • Pascal Genschik
    • Andrée Durr
    • Jacqueline Fleck

    Original Paper Pages: 548 - 556

13. RecA, Tus protein and constitutive stable DNA replication inEscherichia coli rnhA mutants

    • Tokio Kogoma
    • Kathryn G. Barnard
    • Xiankang Hong

    Original Paper Pages: 557 - 562