Artwork: the molecular evolution of NRK (IMAGE)
Caption
Here, the function of NRK at each stage of evolution is depicted frame by frame of a movie film. The rightmost frame shows its involvement in the development of the mouse and human placenta. The frame of the film is a double helix structure of DNA, which gives an image of the major changes that occurred at the DNA level just before the mouse and human frames.
Credit
Conceptualization by the authors. Illustration by Felipe Serrano (http://www.illustrative-science.com/).
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