Amino acid substitutions in NfxB.

<p>Amino acid changes in NfxB caused by missense mutations are indicated with the one letter nomenclature. Amino acid substitutions for proline are shown in red, and changes to residues that differ in polarity or charge from the original one are depicted in blue. The secondary structure obtained from the NfxB homology model is shown (Nomenclature H: Helix; T: Turn; -: Coil). The nine α-helices are numbered from α1 to α9.