1. Tables of critical values for examining compositional non-randomness in proteins and nucleic acids

   • Marshall Laird
   • Richard Holmquist

   OriginalPaper Pages: 261 - 276

2. Deviations from compositional randomness in eukaryotic and prokaryotic proteins: The hypothesis of selective-stochastic stability and a principle of charge conservation

   • Richard Holmquist

   OriginalPaper Pages: 277 - 306

3. Sequence studies on 16S ribosomal RNA from a blue-green alga

   • W. F. Doolittle
   • C. R. Woese
   • D. Stahl

   OriginalPaper Pages: 307 - 315

4. Homologies of ribosomal RNA nucleotide sequences in monocots

   • Fabio Maggini

   OriginalPaper Pages: 317 - 322

5. Doublet frequencies in sequenced nucleic acids

   • R. A. Elton

   OriginalPaper Pages: 323 - 346

6. The phylogenetic status ofPasteurella pestis

   • L. Zablen
   • L. Bonen
   • C. R. Woese

   OriginalPaper Pages: 347 - 358

7. Speculations on the origin and evolution of metabolism

   • Hyman Hartman

   OriginalPaper Pages: 359 - 370

8. Tetrahymena DNA forms a single band in alkaline density gradients

   • Nelson Slavik
   • Lana Stolarsky
   • Charles L. Hershberger

   Letter to the Editor Pages: 371 - 376

9. Species-specific effects and the evolutionary clock: A reply to penny

   • R. Holmquist
   • Thomas H. Jukes

   Letter to the Editor Pages: 377 - 381

10. Recently published papers in the field of molecular evolution

    OriginalPaper Pages: XVII - XX