Brain proteins get on-off lighting.

In Brain General Structure and Function, Brain Science, Brain Technology by Brainy Days Ahead

Proteins are the workhorse molecules of life, carrying oxygen, building tissue, copying DNA for the next generation, and coordinating events within and between cells. Optogenetics, is a technique using light to activate and deactivate proteins that can turn brain cells on and off. Now Researchers at the UNC School of Medicine expand optogenetics to control a wide range of proteins without changing their function, allowing a light-controllable protein to carry out its everyday chores. The proteins can be turned on almost anywhere in the cell, enabling the researchers to see how proteins do very different jobs depending on where they are turned on and off.