Figure 1From: The domain architecture of large guanine nucleotide exchange factors for the small GTP-binding protein ArfVenn diagram of the nine Sec7-containing subfamilies sorted according to the species where each subfamily has been found. The TBS subfamily was identified in this study. The BIG and GBF subfamilies are merged in a higher order subfamily (GBG), and are the only subfamily common to all eukaryotes.Back to article page