Fig. 2
From: Comparative genomics of molybdenum utilization in prokaryotes and eukaryotes
Comparison of different Mo transport systems in prokaryotes and eukaryotes. The Venn diagram is used to show the overlaps of different transporters in each kingdom. a Prokaryotes (left: bacteria; right: archaea): three classes of high-affinity Mo/W ABC transport systems are known: ModABC, WtpABC and TupABC; b Eukaryotes: two classes of Mo transporters are known: MOT1 and MOT2