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