Fig. 3. Evolutionary history of proteins involved in magnetotaxis in Magnetospirillum relatives.

a Species tree from Fig. 1a. Gene trees built from the concatenation of Mam proteins present in b mms6, mamGFDC and mamAB operons, c the mamXY operon (including here the mag1, 2, and 3 genes) and d the feoABm operon. Strains names and external branches are colored according to the subgroups of the first panel to facilitate the visualization of relationships in gene trees. Gene trees were rooted with the other magnetotactic Alphaproteobacteria of the Fig. 1a including strain LM-1.