Data from: Sexual dimorphism and retinal mosaic diversification following the evolution of a violet receptor in butterflies

Kyle J. McCulloch, Furong Yuan, Ying Zhen, Matthew L. Aardema, Gilbert Smith, Jorge Llorente-Bousquets, Peter Andolfatto & Adriana D. Briscoe
Numerous animal lineages have expanded and diversified the opsin-based photoreceptors in their eyes underlying color vision behavior. However, the selective pressures giving rise to new photoreceptors and their spectral tuning remain mostly obscure. Previously, we identified a violet receptor (UV2) that is the result of a UV opsin gene duplication specific to Heliconius butterflies. At the same time the violet receptor evolved, Heliconius evolved UV-yellow coloration on their wings, due to the pigment 3-hydroxykynurenine (3-OHK)...
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