- Rox, a novel bHLHZip protein expressed in quiescent cells that heterodimerizes with Max, binds a non-canonical E box and acts as a transcriptional repressor. Meroni, G., Reymond, A., Alcalay, M., Borsani, G., Tanigami, A., Tonlorenzi, R., Nigro, C.L., Messali, S., Zollo, M., Ledbetter, D.H., Brent, R., Ballabio, A., Carrozzo, R. EMBO J. (1997)