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