FIGURE 1.

Anchor peptide alignment of ApH49, AsH57, and ApH87 TbpBs. Identical residues and conserved residues are highlighted and boxed in red. The anchor peptide secondary structure element from ApH87 TbpB (Protein Data Bank (PDB) entry 3PQS) is shown above the sequence. Amino acids from ApH49 and AsH57 TbpBs (PDB entry 3HOL and 3PQU) that interact with the TbpB C-lobe are highlighted in blue. Numbering above the sequence illustrates the sites of N-terminal truncation of recombinant ApH49 TbpB constructs.