Fig. 1.

Unrooted, neighbor-joining (NJ)-based tree of the Grx family in photosynthetic organisms. The analysis was performed using MEGA 4 with the setup described in “Material and methods”. Branch lengths are proportional to phylogenetic distances. For clarity, the protein names have been removed but they are available in Figs. 3, 4, 5, 6 and 7. The full names and the corresponding accession numbers of all Grx sequences are available in ESM file 1. Around 99% of the members are clustering into one of the six Grx classes defined