The method 3, wherein {HEAD ~ X} encodes {TAIL ~ an αgalactosyltransferase} 
encodes
The method 3 , wherein { HEAD ~ X } encodes { TAIL ~ an αgalactosyltransferase }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL