Oparin's ``Origin of Life'': Sixty Years Later Stanley L. MillerJ. William SchopfAntonio Lazcano Pages: 351 - 353
Energy from Redox Disproportionation of Sugar Carbon Drives Biotic and Abiotic Synthesis Arthur L. Weber Pages: 354 - 360
Converting Amino Acid Alignment Scores into Measures of Evolutionary Time: A Simulation Study of Various Relationships Da-Fei FengRussell F. Doolittle Pages: 361 - 370
Complete Sequence of SpHox8 and Its Linkage in the Single Hox Gene Cluster of Strongylocentrotus purpuratus Pedro MartinezJason C. LeeEric H. Davidson Pages: 371 - 377
Sequences and Evolution of Human and Squirrel Monkey Blue Opsin Genes Lawrence C. ShimminPhuong MaiWen-Hsiung Li Pages: 378 - 382
Amelioration of Bacterial Genomes: Rates of Change and Exchange Jeffrey G. LawrenceHoward Ochman Pages: 383 - 397
Evidence for AT-Transversion Bias in Wasp (Hymenoptera: Symphyta) Mitochondrial Genes and Its Implications for the Origin of Parasitism Mark DowtonAndrew D. Austin Pages: 398 - 405
Phylogenetic Position of Mammoth and Steller's Sea Cow Within Tethytheria Demonstrated by Mitochondrial DNA Sequences Tomowo OzawaSeiji HayashiVictor M. Mikhelson Pages: 406 - 413
The Length Distribution of Perfect Dimer Repetitive DNA Is Consistent with Its Evolution by an Unbiased Single-Step Mutation Process George I. BellJerzy Jurka Pages: 414 - 421
Sperm Nuclear Basic Proteins (SNBPs) of Agnathans and Chondrichthyans: Variability and Evolution of Sperm Proteins in Fish Nuria SaperasManel ChivaJuan Ausió Pages: 422 - 431
Isolation and Characterization of a Carbonic Anhydrase Homologue from the Zebrafish (Danio rerio) Robert E. PetersonChingkuang TuPaul J. Linser Pages: 432 - 439
Extensive Sequence Conservation Among Insect, Nematode, and Vertebrate Vitellogenins Reveals Ancient Common Ancestry Jeng-Shong ChenThomas W. SappingtonAlexander S. Raikhel Pages: 440 - 451
Extraordinary Conservation of Cysteines Among Homologous Chironomus Silk Proteins sp185 and sp220 Steven T. CaseCarol CoxRobert Hamilton Pages: 452 - 462
Sex Differences in Mutation Rate in Higher Primates Estimated from AMG Intron Sequences Wei HuangBenny H.-J. ChangW.-H. Li Pages: 463 - 465
The Vertebrate Linker Histones H10, H5, and H1M Are Descendants of Invertebrate ``Orphon'' Histone H1 Genes Ekkehard SchulzeBettina Schulze Pages: 466 - 467
Unbiased Estimation of Symmetrical Directional Mutation Pressure from Protein-Coding DNA Lars S. JermiinPeter G. FosterRoss H. Crozier Pages: 468 - 468
Evolution of Promoter Sequences: Elements of a Canonical Promoter for Prespore Genes of Dictyostelium Craig MillerJohn McDonaldDavid Francis Pages: 469 - 469
Neutral and Nonneutral Mutations: The Creative Mix—Evolution of Complexity in Gene Interaction Systems Emile Zuckerkandl Pages: 470 - 470
