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