Can TGF beta family induce all somatic stem cells?
Signalling in the TGF&beta; pathway normally puts a brake on the progress of cells through the cell cycle - it counteracts the action of myc for example, partly by regulating the expression of myc. In Burkitt's lymphoma myc escapes this regulation because of a chromosomal translocation, tipping the regulatory balance over to uncontrolled cell growth.

This anti-proliferative action of TGF&beta; signalling is so critical that you might expect it to be ubiquitous in cells, and the expression atlas entry for the TGF&beta; receptor is consistent with this.