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