{HEAD ~ Preferred MRT polypeptides} are capable of, for example, transporting {TAIL ~ metals}, e.g., Fe, e.g., Fe, Cd, Co, Mn, Pb, Hg and Zn 
{ HEAD ~ Preferred MRT polypeptides } are capable of , for example , transporting { TAIL ~ metals } , e.g. , Fe , e.g. , Fe , Cd , Co , Mn , Pb , Hg and Zn
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH