| Evolution of transposable elements: an IS10 insertion increases fitness in Escherichia coli | L Chao, SM McBroom | 359 |
| Chimpanzee fetal G gamma and A gamma globin gene nucleotide sequences provide further evidence of gene conversions in hominine evolution | JL Slightom, LY Chang, BF Koop, M Goodman | 370 |
| Codon usage in the vertebrate hemoglobins and its implications | TF Smith, WW Ralph, M Goodman, J Czelusniak | 390 |
| The small-subunit ribosomal RNA gene sequences from the hypotrichous ciliates Oxytricha nova and Stylonychia pustulata | HJ Elwood, GJ Olsen, ML Sogin | 399 |
| Characteristics of a conserved 1,579-bp highly repetitive component in the killer whale, Orcinus orca | B Widegren, U Arnason, G Akusjarvi | 411 |
| The phylogeny of the hominoid primates: a statistical analysis of the DNA-DNA hybridization data | AR Templeton | 420 |
| On the PAM matrix model of protein evolution | WJ Wilbur | 434 |
| Book review | WH Li | 448 |
| Generation time and the rate of molecular evolution | S Easteal | 450 |
