modifications pertained to : ( a ) the production of a high titer goat anti-cea antiserum that was rendered highly specific by solid phase immunoabsorption with cyanogen bromide-activated sepharose conjugates of normal plasma liver , and colon perchloric acid-soluble glycoprotein antigens : ( b ) the introduction of suitable alterations in the experimental conditions of radioiodination procedure to minimize and to prevent breakdown of the antigen , thus prolonging the storage of the labeled antigen ;
C0007082
cea
C0017968
glycoprotein