Figure 5

Arrangement of genes in the cluster (A) and model (B) of the Ech-type complex Ech1. Electron flow from reduced ferredoxin to H⁺ and the coupled export of protons is shown. FeS clusters are indicated. *, predicted transmembrane protein (number of transmembrane helices); Fd, ferredoxin; orf1/orf2, encoding small FeS containing proteins (TKV_c01280 and TKV_c01290) with similarity to the N-terminus of MetV.