1. Letter from the editor

   Letter Pages: 1 - 1

2. Genomes as smart systems

   Commentary Pages: 3 - 4

3. From genes to phenotype: dynamical systems and evolvability

   • P. Alberch

   Mini-Review Pages: 5 - 11

4. Functional analysis of the 3′-terminal sequence of the maize controlling element (Ac) by internal replacement and deletion mutagenesis

   • J. H. Zhou
   • A. Myers
   • A. G. Atherly

   Research Article Pages: 13 - 21

5. Unusual codon bias occurring within insertion sequences in Escherichia coli

   • J. G. Lawrence
   • D. L. Hartl

   Research Article Pages: 23 - 29

6. Evidence for a relationship between the Bombyx mori middle repetitive Bm1 sequence family and U1 snRNA

   • R. J. Herrera
   • J. Wang

   Research Article Pages: 31 - 37

7. An ‘axis-like’ material in the centromeric region of metaphase-I chromosomes from mouse spermatocytes

   • C. J. Tandler
   • A. J. Solari

   Research Article Pages: 39 - 49

8. Fluctuation analysis: the effect of plating efficiency

   • F. M. Stewart

   Research Article Pages: 51 - 55

9. Announcement

   Announcement Pages: 57 - 57