Cometabolism is generally defined as the simultaneous biotransformation of {HEAD ~ a primary energy source}, such as methane, and a secondary chemical species, such as {TAIL ~ chlorinated alkenes} 
Cometabolism is generally defined as the simultaneous biotransformation of { HEAD ~ a primary energy source } , such as methane , and a secondary chemical species , such as { TAIL ~ chlorinated alkenes }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL