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