For {HEAD ~ expression} in {TAIL ~ Saccharomyces}, the plasmid YRp7, for example, is commonly used 
For { HEAD ~ expression } in { TAIL ~ Saccharomyces } , the plasmid YRp7 , for example , is commonly used
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH