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