Comparison of Obp sequences identified in M. glareolus salivary samples. Sequence regions elucidated by mass spectrometry are marked in color. Regions in red bold were confirmed by both MS/MS techniques, regions in red normal were confirmed by one of the employed MS/MS techniques. Sequence positions in green bold correspond to amino acid changes in Obp3 variants. The regions in black are derived only from the clone nucleotide sequences and were not confirmed by mass spectrometry.