Previous studies showed that NT2/D1 cells and four different human embryonal carcinoma cell lines expressed only the FL-CR-1 transcript, whereas, human colon carcinoma and hepatocarcinoma cell lines (SW480, SW620, LS174T, GEO, CBS, HepG2 and Hep3B) expressed only the truncated form of CR-1 mRNA [30, 31]. Here, CR1 is linked to embryonal carcinoma.