Figure 6. TGF-β1 has a higher affinity for TβRII-B than for TβRII.

Different concentrations of [¹²⁵I]TGF-β1 were incubated with K562 cells that stably expressed TβRII or TβRII-B and the ratio of [¹²⁵I]TGF-β1 binding calculated. K562 parental cells served as a control. The data are representative of two independent experiments. The data represent the mean ± SEM. *P < 0.05, two-tailed Student's t-test.