{TAIL ~ The chlorinated alkenes} are acted upon by {HEAD ~ the enzyme methane monooxygenase} which oxidizes them into epoxides 
{ TAIL ~ The chlorinated alkenes } are acted upon by { HEAD ~ the enzyme methane monooxygenase } which oxidizes them into epoxides
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH