Additional file 1.
Table with type of SWS1 single cones (VS or UVS) interpreted from avian opsin amino acid (aa) sequences. Bold letters mark spectral tuning amino acid positions 86, 90 and 93. Amino acid residues without a known spectral tuning effect are noted. Number of birds sequenced is indicated after species names. *See note below table.
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Ödeen and Håstad BMC Evolutionary Biology 2013 13:36 doi:10.1186/1471-2148-13-36