1. Random walking

   • Thomas H. Jukes

   BriefCommunication Pages: 477 - 478

2. Evolution of collagen IV genes from a 54-base pair exon: A role for introns in gene evolution

   • Giovanna Butticè
   • Paul Kaytes
   • Markku Kurkinen

   OriginalPaper Pages: 479 - 488

3. Evolutionary origin of aminoglycoside phosphotransferase resistance genes

   • Ralph Kirby

   OriginalPaper Pages: 489 - 492

4. Sequences related to the maize transposable elementAc in the genusZea

   • M. A. Johns

   OriginalPaper Pages: 493 - 499

5. Discrepancy in divergence of the mitochondrial and nuclear genomes ofDrosophila teissieri andDrosophila yakuba

   • Monique Monnerot
   • Michel Solignac
   • David R. Wolstenholme

   OriginalPaper Pages: 500 - 508

6. What causes the aphid 28S rRNA to lack the hidden break?

   • Kimihiro Ogino
   • Hiroko Eda-Fujiwara
   • Hajime Ishikawa

   OriginalPaper Pages: 509 - 513

7. Comparison of primary and secondary 26S rRNA structures in twoTetrahymena species: Evidence for a strong evolutionary and structural constraint in expansion segments

   • J. Engberg
   • H. Nielsen
   • T. Higashinakagawa

   OriginalPaper Pages: 514 - 521

8. Evolution of EF-hand calcium-modulated proteins. I. Relationships based on amino acid sequences

   • Nancy D. Moncrief
   • Robert H. Kretsinger
   • Morris Goodman

   OriginalPaper Pages: 522 - 562

9. Erratum

   Erratum Pages: 563 - 563