1. Editorial

   • E. Zuckerkandl

   EditorialNotes Pages: II - III

2. Evolution ofαq- andβ-tubulin genes as inferred by the nucleotide sequences of sea urichin cDNA clones

   • Despina Alexandraki
   • Joan V. Ruderman

   OriginalPaper Pages: 397 - 410

3. Phylogeny of protozoa deduced from 5S rRNA sequences

   • Tsutomu Kumazaki
   • Hiroshi Hori
   • Syozo Osawa

   OriginalPaper Pages: 411 - 419

4. tRNA-rRNA sequence homologies: Evidence for a common evolutionary origin?

   • David P. Bloch
   • Barbara McArthur
   • Jean Smith

   OriginalPaper Pages: 420 - 428

5. Experimental evolution of a novel pathway for glycerol dissimilation inEscherichia coli

   • R. Z. Jin
   • John C. -T. Tang
   • E. C. C. Lin

   OriginalPaper Pages: 429 - 436

6. The spatial distribution of fixed mutations within genes coding for proteins

   • Richard Holmquist
   • Morris Goodman
   • John Czelusniak

   OriginalPaper Pages: 437 - 448

7. The analysis of hidden electrophoretic variation: Interspecific electrophoretic differentiation and amino acid divergence

   • Paul A. Fuerst
   • Robert E. Ferrell

   OriginalPaper Pages: 449 - 454

8. The protein burden oflac operon products

   • Arthur L. Koch

   OriginalPaper Pages: 455 - 462

9. Recently published papers in the field of molecular evolution

   • L. Träger

   Legacy Pages: 463 - 466