- Bone morphogenetic protein 2 (BMP-2) induces sequential changes of Id gene expression in the breast cancer cell line MCF-7. Clement, J.H., Marr, N., Meissner, A., Schwalbe, M., Sebald, W., Kliche, K.O., Höffken, K., Wölfl, S. J. Cancer Res. Clin. Oncol. (2000)