{HEAD ~ The enzyme} is obtainable from {TAIL ~ natural sources} such as microorganisms of the genus Thermoanaerobium, and obtainable by recombinant technology 
is obtainable from
{ HEAD ~ The enzyme } is obtainable from { TAIL ~ natural sources } such as microorganisms of the genus Thermoanaerobium , and obtainable by recombinant technology
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH