In preferred embodiments, an MRT polypeptide comprises {HEAD ~ an amino acid sequence} of SEQ ID NO:2, SEQ ID NO:4, SEQ ID NO:6, SEQ ID NO:8 or {TAIL ~ SEQID} NO:14 
of
In preferred embodiments , an MRT polypeptide comprises { HEAD ~ an amino acid sequence } of SEQ ID NO:2 , SEQ ID NO:4 , SEQ ID NO:6 , SEQ ID NO:8 or { TAIL ~ SEQID } NO:14
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH