a human pancreatic adenocarcinoma was used to develop two histologically distinct xenograft lines , one associated with high levels ( 180-2000 ng ml-1 ) and one with low levels ( greater than 2.0 less than 8.0 ng ml-1 ) of serum carcinoembryonic antigen ( cea ) .
C0086418
human
C0007082
carcinoembryonic antigen