Background Of the 20 or so signal transduction pathways that orchestrate cell-cell
interactions in metazoans, seven are involved during development. One of these is the Notch …

… b | A timeline of the origins of the major multicellular eukaryotic clades showing that
transitions to multicellularity have occurred at very different times in the history of life. The …

An external skeleton is an essential part of the body plan of many animals and is thought to
be one of the key factors that enabled the great expansion in animal diversity and disparity …

… b, Northern blot of total RNA from mixed stage C. elegans (lane 1) and D. melanogaster
developmental … b, Northern blot of total RNA from mixed stage C. elegans (lane 1) and D. rerio …

… (B) Multiple sequence alignment of six shotgun sequence fragments showing sequence-… ”)
and the next two come from the other (“B”), because the discrepancies with the consensus fall …

Sponges are an ancient group of animals that diverged from other metazoans over 600 million
years ago. Here we present the draft genome sequence of Amphimedon queenslandica, …

… b, An annotated pre-mRNA corresponding to numerous small RNAs resistant to periodate
treatment. Annotated coding segments (open boxes) and intron segments (black line) are …

… Furthermore, the arrangement of the three axes that describe a crystal's orientation (a, b,
and c) differ between abalone and oyster; the a and b faces of each CaCO 3 crystal of …

… (B) Ligand-binding residues are very highly conserved within a specific type of PDZ
domain. Conservation of the 13 binding residues compared to the remaining 61 more distant …

… Row labels in a denote the site of predominant gene expression; row labels in b show
species with reported Z-disc localization of the gene product. Multifamily protein and orthologies …