DLK1 and adrenal gland neoplasm: Established cell lines selected from tissues that express the endogenous Dlk1 gene: NIH-3T3 (mouse embryonic fibroblast), C2C12 (mouse myoblast), SVR (mouse pancreatic islet) and Y-1 (mouse adrenal tumor), were transiently transfected with the plasmids pGL3-B, pGL3-C, pGL3-Dlk1P, or the individual pGL3-CEs.