The methanotrophic microorganisms 21 can be comprised of either a single bacterial species or {HEAD ~ a consortia} of {TAIL ~ several bacterial species}, and other microorganisms 
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The methanotrophic microorganisms 21 can be comprised of either a single bacterial species or { HEAD ~ a consortia } of { TAIL ~ several bacterial species } , and other microorganisms
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH