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