1. Forthcoming papers

   Legacy Pages: iii - iii

2. Alternative bases in the RNA world: The prebiotic synthesis of urazole and its ribosides

   • V.M. Kolb
   • J.P. Dworkin
   • S.L. Miller

   OriginalPaper Pages: 549 - 557

3. In vitro selection of optimal DNA substrates for ligation by a water-soluble carbodiimide

   • Kazuo Harada
   • Leslie E. Orgel

   OriginalPaper Pages: 558 - 560

4. The use of gel electrophoresis to study the reactions of activated amino acids with oligonucleotides

   • Gerhard Zieboll
   • Leslie E. Orgel

   OriginalPaper Pages: 561 - 565

5. Evolutionary relationships of bacterial and archaeal glutamine synthetase genes

   • J.R. Brown
   • Y. Masuchi
   • W.F. Doolittlel

   OriginalPaper Pages: 566 - 576

6. The atpB and rbcL promoters in plastid DNAs of a wide dicot range

   • Jean-François Manen
   • Vincent Savolainen
   • Patrice Simone

   OriginalPaper Pages: 577 - 582

7. Highly repetitive structure and its organization of the silk fibroin gene

   • Kazuei Mita
   • Sachiko Ichimura
   • Tharappel C. James

   OriginalPaper Pages: 583 - 592

8. The structure of the small mitochondrial DNA of Kluyveromyces thermotolerans is likely to reflect the ancestral gene order in fungi

   • G.D. Clark-Walker
   • G.F. Weiller

   OriginalPaper Pages: 593 - 601

9. Relationship among coelacanths, lungfishes, and tetrapods: A phylogenetic analysis based on mitochondrial cytochrome oxidase I gene sequences

   • Shin-ichi Yokobori
   • Masami Hasegawa
   • Kimitsuna Watanabe

   OriginalPaper Pages: 602 - 609

10. Evidence that stilbene synthases have developed from chalcone synthases several times in the course of evolution

    • S. Tropf
    • T. Lanz
    • G. Schröder

    OriginalPaper Pages: 610 - 618

11. Variable evolutionary rates in the molecular evolution of mammalian growth hormones

    • M. Wallis

    OriginalPaper Pages: 619 - 627

12. Interdomain linkage in the polymeric hemoglobin molecule of Artemia

    • Clive N.A. Trotman
    • Anthony M. Manning
    • Warren P. Tate

    OriginalPaper Pages: 628 - 636

13. Drive-selection equilibrium: Homopolymer evolution in the Drosophila gene mastermind

    • Stuart J. Newfeld
    • Hidenori Tachida
    • Barry Yedvobnick

    Letter to the Editor Pages: 637 - 641

14. Estimation of the number of amino acid substitutions per site when the substitution rate varies among sites

    • Tatsuya Ota
    • Masatoshi Nei

    Letter to the Editor Pages: 642 - 643