 DNA carcass radiodurans, DRAA, NRAAMP is a natural resistance associated macrophage protein that plays a key role in maintaining cellular metal homeostasis. It has been shown to be able to bind and transport both physiologically important metals such as manganese and non-essential metals such as cadmium. The study presented here provides insight into the mechanism behind this selective transport process, which is critical for understanding the biology of these essential metal transporters. This article was authored by Shamita Ray, Samuel P. Berry, Eric A. Wilson, and others.