In {TAIL ~ one aspect}, {HEAD ~ the endogenous PUFA PKS system} has been modified by mutagenesis of a nucleic acid sequence that encodes at least one domain of the endogenous PUFA PKS system 
In
In { TAIL ~ one aspect } , { HEAD ~ the endogenous PUFA PKS system } has been modified by mutagenesis of a nucleic acid sequence that encodes at least one domain of the endogenous PUFA PKS system
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH