Fig. 2
From: Reduction, alignment and visualisation of large diverse sequence families
Rhodopsin family. Over 180,000 rhodopsin sequences reduced to 14 coloured as Fig. 1 but with an added blue component to indicate predicted TM segments. As these typically overlay red α-helix predictions, the resulting purple hue can be taken to identify the seven TM-segments which are even clearer in the averaged colours (lower panels)