Linda Sealy et al. have established that the largest form of C/EBPβ observed in transformed breast cancer cell lines is C/EBPβ-2 (LAP), whereas the full-length C/EBPβ-1 (LAP*) is only expressed in whole tissues in vivo or in primary epithelial cells in vitro[29], [30]. This evidence concerns the gene CEBPB and breast cancer.