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Image   •   Dec 21, 2015 15:52 GMT

Illustration of the mechanism underlying Dun colour. TBX3 expression (indicated in green) in the hair follicle in Dun horses leads to lack of pigment production in parts of the hair follicle; pigment indicated in balck. In non-dun horses there is no TBX3 expression in the hair follicle, and the entire hair is fully pigmented.
License Creative Commons Attribution, no derivatives (?)
Photographer / Source Kelly McGowan and Freyja Imsland
Size 96.3 KB
Format .jpg
Image dimensions 1181 x 1181 pixels