As discussed above, the most critical factor to {HEAD ~ antibody production} is {TAIL ~ specificity} to a desired antigen or epitope on an antigen 
As discussed above , the most critical factor to { HEAD ~ antibody production } is { TAIL ~ specificity } to a desired antigen or epitope on an antigen
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH