A preferred protein is an enzyme such as thermolysin, elastase, {HEAD ~ asparaginase}, lysozyme, {TAIL ~ lipase} or urease 
A preferred protein is an enzyme such as thermolysin , elastase , { HEAD ~ asparaginase } , lysozyme , { TAIL ~ lipase } or urease
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH