In another embodiment, the nucleic acid of the invention encodes an MRT polypeptide or an active portion or fragment thereof having {TAIL ~ an amino acid sequence} shown in SEQ ID NO:2, SEQ ID NO:4, {HEAD ~ SEQ ID NO:6}, SEQ ID NO:8, or SEQ ID NO:14 
In another embodiment , the nucleic acid of the invention encodes an MRT polypeptide or an active portion or fragment thereof having { TAIL ~ an amino acid sequence } shown in SEQ ID NO:2 , SEQ ID NO:4 , { HEAD ~ SEQ ID NO:6 } , SEQ ID NO:8 , or SEQ ID NO:14
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH