The invention further relates to screening {HEAD ~ methods} for identifying {TAIL ~ binding partners} of the polypeptides 
for identifying
The invention further relates to screening { HEAD ~ methods } for identifying { TAIL ~ binding partners } of the polypeptides
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH