1. The clustering on thePseudomonas putida chromosome of genes specifying dissimilatory functions

   • B. J. Leidigh
   • M. L. Wheelis

   OriginalPaper Pages: 235 - 242

2. A new isozyme of triose phosphate isomerase specific to hominoids

   • H. Rubinson
   • M. C. Meienhofer
   • J. C. Dreyfus

   OriginalPaper Pages: 243 - 250

3. The effect of Mg²⁺ and Ca²⁺ on urea-catalyzed phosphorylation reactions

   • G. J. Handschuh
   • R. Lohrmann
   • L. E. Orgel

   OriginalPaper Pages: 251 - 262

4. The relationship of DNA base composition and individual protein composition in micro-organisms

   • R. A. Elton

   OriginalPaper Pages: 263 - 276

5. Doublet frequency analysis of bacterial DNAs

   • G. J. Russell
   • D. J. McGeoch
   • J. H. Subak-Sharpe

   OriginalPaper Pages: 277 - 292

6. Doublet frequencies in the DNA of genetic code limit organisms

   • R. A. Elton

   OriginalPaper Pages: 293 - 302

7. Catalysts for the self-polymerization of adenosine cyclic 2′,3′-phosphate

   • M. S. Verlander
   • R. Lohrmann
   • L. E. Orgel

   OriginalPaper Pages: 303 - 316

8. The probability of electrophoretic idendity of proteins as a function of amino acid divergence

   • Jack Lester King

   OriginalPaper Pages: 317 - 322

9. Genetic distance and electrophoretic identity of proteins between taxa

   • Masatoshi Nei
   • Ranajit Chakraborty

   OriginalPaper Pages: 323 - 328

10. Self-complementarity of messenger RNA's of periodic proteins

    • Martynas Yčas

    OriginalPaper Pages: 329 - 338

11. Transfer RNA: Evidence for decreasing size variation during evolution

    • H. J. Gross

    OriginalPaper Pages: 339 - 342

12. Recently published protein sequences. III

    • Thomas H. Jukes
    • Richard Holmquist

    Letter to the Editor Pages: 343 - 361

13. Recently published papers in the field of molecular evolution

    OriginalPaper Pages: V - X