Regulatory T cells need to express a diverse T-cell-receptor repertoire to control pathogenic self-reactive T cells; here it is shown that repertoire diversification depends on the intronic Foxp3 enhancer CNS3 acting at the regulatory T-cell-precursor stage to induce T-cell-receptor responsiveness to low-strength signals.
- Yongqiang Feng
- Joris van der Veeken
- Alexander Y. Rudensky
