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