Example of a Spider Toxin Record (STR). STR for δ-hexatoxin-Ar1a, the lethal toxin from the Sydney funnel-web spider Atrax robustus. The top section of the STR provides a summary of the toxin's activity, the source species, and year of discovery. The dynamically generated toxin image displays the mature toxin sequence and, where available, its disulfide-bond framework, pharmacophore residues, and posttranslational modifications. Below this image are additional user-expandable sections that provide information about the toxin's molecular target, phyletic specificity, and 3D structure, as well as literature references, toxin synonyms, and both current and historic taxonomy of the source species. Clicking the spider photo yields a downloadable high-resolution image.