PODXL and embryonal carcinoma: In contrast with the murine embryonic endoderm and embryonal carcinoma-associated antigens, the human embryonic endoderm- and embryonal carcinoma-associated antigen recognized by the monoclonal mAb FC10.2 was assigned as the lacto-N-tetraose sequence, with T1 (Galβ-3GlcNAc) -T2 backbone sequence, structure 6 (Table I); this was detected on a glycoprotein with an apparent molecular weight, ∼200 kDa, (9, 10) similar to that of podocalyxin (11).