The concept centers on a particular protein called clathrin, which has a unique knack for assembling itself into versatile structures that foster the formation of complex molecules. Clathrin is present in every cell in the human body, but cows possess a vast wealth of it in their bovine brains that make them an ideal source for the stuff. And given the right biochemical directions, researchers think they can coax clathrin into creating better batteries and solar cells
http://www.popsci.com/science/article/2010-04/protein-cow-brains-could-build-better-batteries-solar-cells






