The MRT polypeptides of the invention are capable of transporting metals such as {TAIL ~ Fe}, Cd, Co, {HEAD ~ Mn}, Pb, Hg and Zn 
The MRT polypeptides of the invention are capable of transporting metals such as { TAIL ~ Fe } , Cd , Co , { HEAD ~ Mn } , Pb , Hg and Zn
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH