These proteins interact with a conserved family of cell surface serine/threonine-specific protein kinase receptors, and generate intracellular signals using a conserved family of proteins called SMADs.
The O'Reilly Factor | The X Factor (UK) | Microphthalmia-associated transcription factor | The X Factor | Fear Factor | Max Factor | Beta | Tau Beta Pi | The X Factor (TV series) | B-cell activating factor | Phi Beta Sigma | Epidermal growth factor receptor | beta | Zeta Beta Tau | TGF beta 1 | Psi Factor: Chronicles of the Paranormal | Beta Gamma Sigma | Astro Boy: Omega Factor | The Limits to Growth | The Beta Band | Tau Beta Sigma | Phi Beta Kappa Society | growth | Economic growth | Beta Israel | twist transcription factor | The X Factor (U.S.) | The X Factor (UK TV series) | The X Factor (UK series 2) | The Omega Factor |