FIG 3.

Nbp35/Cfd1 phylogeny and alignment features. (a) Maximum likelihood phylogeny of the cytosolic Fe/S cluster assembly proteins Nbp35 and Cfd1 and bacterial homologues. The statistical support values shown are as described for Fig. 2. The Nbp35 and Cfd1 groups are indicated and correspond to the presence versus absence of the ferredoxin domain at their N termini, respectively. Members of the clade marked with the black dot share a variable-length insertion in the carboxyl terminus of the Nbp35 protein. (b) A portion of the amino acid sequence alignment depicting the taxa sharing the insertion in the Nbp35 protein.