Additional file 9.

Alignment of PGRP ancestral sequences. Alignment of ancestral sequences of PGRP-L and PGRP-S. A dash means the same amino acid as the above. A blue star indicates the amino acid position responsible for Zn2+ ligand binding, whereas a red star indicates the amino acid position responsible for amidase activity. These sites are inferred from the sequences of T7 lysozyme of bacteriophage.

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MontaƱo et al. BMC Evolutionary Biology 2011 11:79   doi:10.1186/1471-2148-11-79