The number of Rab GTPase orthologoues.

The yeast and Arabidopsis proteins are used as bait to assign classification based on domain architecture (classes I to III; see Material and Methods). Given are the complex and factor (column 1 and 2) as well as the major bait (*) and minor bait (+) in the orthologous groups of a respective factor. The major bait (*) was chosen from yeast or Arabidopsis proteins due to their reliability to be involved in vesicular transport; and the order for choosing the bait is yeast proteins > Arabidopsis experimentally proven proteins (exp.) > Arabidopsis predicted proteins (pred.). Accession numbers and amino acid length of the proteins are listed in Table S17 for the respective species.