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Sequence alignments of SSL4t alleles and SSL4t, SSL5, and SSL11. (a) Amino acid alignment of known SSL4t allele variants. Identity (*), strong similarity (:), and weak similarity (.) are indicated. (b) Amino acid alignment of SSL4t from S. aureus strain Newman, SSL5 from strain GL10, and SSL11 from strain US6610. The 17-amino-acid binding site is underlined, and sequence similarity is labeled as described above.
