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Chromatograms of Vipera berus venoms. The chromatograms (220 nm) correspond to venoms obtained from melanistic (orange line) and cryptic (blue line) specimens, eluted and measured using a gradient of acetonitrile (dashed line) over a 30 min time frame. Differences in peak intensities are highlighted by colouring the area between the traces, using the colour code of the venom exhibiting the more intense signals.
