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