Aldosterone receptor engraving

This is intaglio engraving - pretty deep cut on a fairly thick blue cased plate and is a commission for an endocrinologist friend. We came to the idea of doing an enzyme molecule together -- it came out of general discussion on what they would like. How nice to get away from the 'robin-on-the-bough' style of engraving. But must have taken me a full-time week to do. Still, a new departure and it has worked.