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