Figure 4. NocT phylogeny and occurence of the nopaline-binding signature.

The displayed subtree was rooted with HisJ and LAO sequences. For each protein or protein cluster, the residues which are identical to (black) and different from (red) those involved in the binding of arginine (pink box) and nopaline (green box) are indicated. The W, F and L residues at position 77 (pink) may play a similar role in maintaining arginine.