Nucleic Acids Research, 2011, Vol. 39, Database issue D655 Figure 1. ArachnoServer Toxin Card for t-theraphotoxin-Pc1c, a TRPV1 agonist isolated from the venom of the Trinidad chevron tarantula Psalmopoeus cambridgei. The top section of the Toxin Card provides a summary of the toxin’s activity, the source species and year of discovery. The dynamically generated image of the toxin’s primary structure displays the mature toxin sequence and, where available, its disulﬁde-bond framework, pharmacophore residues and posttranslational modiﬁcations. A new addition in Version 2.0 is the automated display of the average and monoisotopic masses for both the reduced and oxidized forms of the toxin. 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.