TY - RPRT TI - Two distinct sequence elements mediate retroviral gene expression in embryonal carcinoma cells. AU - H Weiher AU - E Barklis AU - W Ostertag AU - R Jaenisch PY - 1987 DO - 10.1128/jvi.61.9.2742-2746.1987 UR - https://pubmed.ncbi.nlm.nih.gov/3612950/ ID - 3612950 ER -