... Rosier, R., and O’Keefe, R. (2000) Smad2 and 3 mediate transform-ing growth factor-beta1-induced inhibition of chondrocyte maturation. Endocrinology 141 , 47 28 47 35.52. Xing, J., Ginty, D., and Greenberg, ... response element binding protein. Proc. Natl. Acad. Sci. USA95, 44 81 44 86. 45 . Ahn, S., Olive, M., Aggarwal, S., Krylov, D., Ginty, D. D., and Vinson, C. (1998) A dominant-negative inhibitor ofCREB ... chondrocytes (9). Finally, BMP-2, BMP -4 , and BMP-7 are expressed in the precartilaginous mesenchyme (28) and were shown to enhance chondro-genesis in vitro (29) and in vivo in chick limb buds...