| Letter from the editor: A change in MBE | WM Fitch | 777 |
| Testing phylogenetic approaches with empirical data, as illustrated with the parsimony method | MW Allard, MM Miyamoto | 778 |
| Metabolic compartmentation of vertebrate glutamine synthetase: putative mitochondrial targeting signal in avian liver glutamine synthetase | JW Campbell, DD Smith | 787 |
| Evolutionary adaptation to different thermal environments via transcriptional regulation | DL Crawford, DA Powers | 806 |
| The rate and pattern of nucleotide substitution in Drosophila mitochondrial DNA | K Tamura | 814 |
| Variable arrangement of 5S ribosomal genes within the ribosomal DNA repeats of arthropods | G Drouin, JM Sevigny, IA McLaren, JD Hofman, WF Doolittle | 826 |
| Rate and mode differences between nuclear and mitochondrial small- subunit rRNA genes in mushrooms | TD Bruns, TM Szaro | 836 |
| Constraints on the evolution of plastid introns: the group II intron in the gene encoding tRNA-Val(UAC) | GH Learn, JS Shore, GR Furnier, G Zurawski, MT Clegg | 856 |
| Molecular phylogeny of the Helianthus genus, based on nuclear restriction-fragment-length polymorphism (RFLP) | L Gentzbittel, A Perrault, P Nicholas | 872 |
| Molecular evolution of the fungi: human pathogens | BH Bowman, JW Taylor, TJ White | 893 |
| The origin and possible time of divergence of the Hawaiian Drosophilidae: evidence from DNA sequences | R DeSalle | 905 |
| The molecular basis of genetic diversity among cytoplasms of Triticum and Aegilops. VIII. Mitochondrial RFLP analyses using cloned genes as probes | T Terachi, K Tsunewaki | 917 |
| Phylogeny of some ascaridoid nematodes, inferred from comparison of 18S and 28S rRNA sequences | SA Nadler | 932 |
| A simple method for estimating and testing minimum-evolution trees | A Rzhetsky, M Nei | 945 |
| Detecting geographic subdivision: A comment on a paper by Hudson et al | DE Roff, P Bentzen | 968 |
| Reply to Roff and Bentzen | RR Hudson | 969 |
| A conserved domain in mitochondrial transporters is homologous to a zinc-finger knuckle of nuclear hormone receptors | F Bouillaud, L Casteilla, D Ricquier | 970 |
