The invention is directed to {HEAD ~ an oral biological preparation} for {TAIL ~ specific delivery} in colon, especially an oral insulin preparation for specific delivery in colon 
for
The invention is directed to { HEAD ~ an oral biological preparation } for { TAIL ~ specific delivery } in colon , especially an oral insulin preparation for specific delivery in colon
OTH OTH OTH OTH OTH 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