PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1248140-2 1976 Perchloric acid extraction of serum was followed by counter-immunoelectrophoresis against monospecific antiserum to CEA. Perchloric Acid 0-15 CEA cell adhesion molecule 3 Homo sapiens 116-119