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Alignment of ComX amino acid sequences. The conserved W residue is marked in boldface and was used to align the sequences with the ZEGA program (http://molsoft.com/services/help/intro.htm). The following symbols indicate similar residues: #, hydrophobic residues; ∼, polar residue; ^, small residue; %, aromatic residue. Nonconserved residues are indicated by dots. The N-terminal alanine in B. subtilis 168 ComX is underlined.
