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Alignment of CEACAM1 proteins from nine primate species. Human and B. arachnoides sequences are displayed in the first lines to allow a direct comparison of the altered amino acids. Nine primate sequences were compared to the predicted peptide sequence of B. arachnoides. Numbering corresponds to amino acid (aa) positions considered in the FEL analysis for positively selected sites. Boxes correspond to protein domains and lines point to positively selected aa substitutions.
