A Group I Intron in the Nuclear Small Subunit rRNA Gene of Cryptendoxyla hypophloia, an Ascomycetous Fungus: Evidence for a New Major Class of Group I Introns Sung-Oui SuhKevin G. JonesMeredith Blackwell Pages: 493 - 500
Positional Dependence, Cliques, and Predictive Motifs in the bHLH Protein Domain William R. AtchleyWerner TerhalleAndreas Dress Pages: 501 - 516
Diversification Pattern of the HMG and SOX Family Members During Evolution Stéphan SoullierPhilippe JayVincent Laudet Pages: 517 - 527
RNA Polymerase of Aquifex pyrophilus: Implications for the Evolution of the Bacterial rpoBC Operon and Extremely Thermophilic Bacteria Hans-Peter KlenkThomas-Dirk MeierWolfram Zillig Pages: 528 - 541
Partial Sequence of a Sponge Mitochondrial Genome Reveals Sequence Similarity to Cnidaria in Cytochrome Oxidase Subunit II and the Large Ribosomal RNA Subunit Russell F. WatkinsAndrew T. Beckenbach Pages: 542 - 554
Gene Duplication and Gene Conversion in the Caenorhabditis elegans Genome Colin SempleKenneth H. Wolfe Pages: 555 - 564
Phylogenies of Developmentally Important Proteins Do Not Support the Hypothesis of Two Rounds of Genome Duplication Early in Vertebrate History Austin L. Hughes Pages: 565 - 576
A Novel Tripartite Structure Comprising a Mariner-Like Element and Two Additional Retrotransposons Found in the Bombyx mori Genome Yumiko NakajimaKazuo HashidoHideaki Maekawa Pages: 577 - 585
Contributions to the Phylogeny of the Cyclophyllidea (Cestoda) Inferred from Mitochondrial 12S rDNA Markus von Nickisch-RosenegkRichard LuciusBrigitte Loos-Frank Pages: 586 - 596
Rates of Nucleotide Substitution in Angiosperm Mitochondrial DNA Sequences and Dates of Divergence Between Brassica and Other Angiosperm Lineages Yau-Wen YangKun-Nan LaiWen-Hsiung Li Pages: 597 - 604
Phylogenetic Relationships of Orders Within the Class Colpodea (Phylum Ciliophora) Inferred from Small Subunit rRNA Gene Sequences Denis H. LynnAndré-Denis G. WrightWilhelm Foissner Pages: 605 - 614
Multiple Origins of Cyclodiene Insecticide Resistance in Tribolium castaneum (Coleoptera: Tenebrionidae) Dmitri AndreevMartin KreitmanRichard H. ffrench-Constant Pages: 615 - 624
Identification of Protein-Tyrosine Phosphatases in Archaea Dimitrios J. StravopodisNikos C. Kyrpides Pages: 625 - 627
The Effects of Social Structure, Geographical Structure, and Population Size on the Evolution of Mitochondrial DNA: II. Molecular Clocks and the Lineage Sorting Period Guy A. HoelzerJoel WallmanDon J. Melnick Pages: 628 - 629