three cdna clones coding for the 3 ' region of the intracisternal a-particle ( iap ) , a mouse endogenous retrovirus , were isolated during screening of a library for genes whose expression was modulated during the retinoic acid-induced differentiation of the embryonal carcinoma cell line f9 into parietal endoderm-like ( pe-like ) cells .
C0007589
differentiation
C0007634
cells