Extracted from The Inner Life of a Cell by Cellular Visions and Harvard (http://www.studiodaily.com/2006/07/cellular-visions-the-inner-life-of-a-cell/)
hat tip to reference in note 21 on page 221 of The Demon in the Machine by Paul Davies.
I’m pretty certain that I’ve seen this or something very similar to it in another setting. (Television perhaps?)
Daren Willman