{HEAD ~ Isolated nucleic acid molecules} encoding {TAIL ~ novel members} of the MRT family of polypeptides which include, in a preferred embodiment, at least one transmembrane domain having at least about 30%, more preferably at least about 50%, 55%, 60%, 70%, 80% or 90% amino acid sequence identity with SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8 or SEQ ID NO:14 and at least one histidine rich domain, are described 
{ HEAD ~ Isolated nucleic acid molecules } encoding { TAIL ~ novel members } of the MRT family of polypeptides which include , in a preferred embodiment , at least one transmembrane domain having at least about 30 % , more preferably at least about 50 % , 55 % , 60 % , 70 % , 80 % or 90 % amino acid sequence identity with SEQ ID NO:2 , SEQ ID NO:4 , SEQ ID NO:6 , SEQ ID NO:8 or SEQ ID NO:14 and at least one histidine rich domain , are described
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH