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