The active ester is conjugated to an immunogenic carrier containing {HEAD ~ a primary amine} to form {TAIL ~ the immunogen} having, at least, the immunological specificity of the organic compound and the immunogenicity of the carrier 
The active ester is conjugated to an immunogenic carrier containing { HEAD ~ a primary amine } to form { TAIL ~ the immunogen } having , at least , the immunological specificity of the organic compound and the immunogenicity of the carrier
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH