| Fitness effects of amino acid replacements in the beta-galactosidase of Escherichia coli | AM Dean, DE Dykhuizen, DL Hartl | 469 |
| The rabbit alpha-like globin gene cluster is polymorphic both in the sizes of BamHI fragments and in the numbers of duplicated sets of genes | JF Cheng, RC Hardison | 486 |
| Modern evolution of a single-copy gene: the immunoglobulin C kappa locus in wild mice | E Jouvin-Marche, A Cuddihy, S Butler, JN Hansen, WM Fitch | 500 |
| Small-subunit ribosomal RNA sequence from Naegleria gruberi supports the polyphyletic origin of amoebas | CG Clark, GA Cross | 512 |
| Characterization of a highly conserved sequence related to mutator transposable elements in maize | LE Talbert, VL Chandler | 519 |
| Evolution of aminobenzoate synthases: nucleotide sequences of Salmonella typhimurium and Klebsiella aerogenes pabB | P Goncharoff, BP Nichols | 531 |
| Pseudomonas aeruginosa diaminopimelate decarboxylase: evolutionary relationship with other amino acid decarboxylases | C Martin, B Cami, P Yeh, P Stragier, C Parsot | 549 |
| Evolutionary conservation of the chromosomal configuration and regulation of amylase genes among eight species of the Drosophila melanogaster species subgroup | V Payant, S Abukashawa, M Sasseville, BF Benkel, DA Hickey | 560 |
| Relationships between gene trees and species trees | P Pamilo, M Nei | 568 |
| Estimation of relatedness by DNA fingerprinting | M Lynch | 584 |
| Announcement | | 600 |
| Erratum | | 601 |
