BIO-FERROELECTRICS. “Researchers have studied the ferroelectric properties of the smallest unit of the elastic protein found in tissues that expand and contract repeatedly, tropoelastin. Elastin itself is an important component of the lung, heart and arteries. This demonstration … is the first to show ferroelectric switching in a biological material occurring at the molecular level.”
http://www.materialstoday.com/biomaterials/news/biological-ferroelectrics/