{HEAD ~ Methanotrophic microorganisms} 21 are generally defined as {TAIL ~ those microorganisms} which can derive energy from the utilization of methane 19, specifically by oxidation 
are generally defined as
{ HEAD ~ Methanotrophic microorganisms } 21 are generally defined as { TAIL ~ those microorganisms } which can derive energy from the utilization of methane 19 , specifically by oxidation
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH