Movie S1.
NG-Smad3 cells treated with Tgf-β1. Tgf-β1 is added between t = −4 min and t = 0 to a final concentration of 2.4 ng/mL. Images were acquired at 4-min intervals.
Sensing relative signal in the Tgf-β/Smad pathway
PNAS. 2017. 114:E2975-E2982 DOI: 10.1073/pnas.1611428114