Cbfa1/Runx2-moléculas ósseas
Representation of Cbfa1 during the growth and differentiation of fetal rat calvarial osteoblasts. A, DNA binding activity of Cbfa1 during osteoblast differentiation. EMSAs were performed using rat osteoblast nuclear extracts (lanes 1 and 2, d 3; lanes 3 and 4, d 14; lanes 5 and 6, d 23), a probe containing the consensus Cbfa-binding site and Cbfa1 antiserum (38 ). Lanes 1, 3, and 5, Nuclear extracts incubated with preimmune serum; lanes 2, 4, and 6, nuclear extracts incubated with 1 µl Cbfa1 antiserum. Dried gels were exposed for 6 h. The Cbfa1-containing complex (OBSC) and the supershifted bands (supershift) are indicated. The graph to the right is an average of the densitometric analysis of the supershifted complex. B, Cbfa1-immunoreactive proteins during osteoblast differentiation. Western blots were performed using rat osteoblast nuclear extracts obtained from different stages of growth and differentiation (proliferating d 2, differentiating d 14, and mineralizing d 20) as indicate...