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