... Follistatin, Chordin and Noggin[12]. These proteins are antagonists of BMP and othermembers of the TGF-b family, binding to and inhibit-ing these signaling molecules from binding to theirreceptors ... protein 2 in the early devel-opment of Xenopus laevis. Mech Dev 52, 357–370.7 Fainsod A, Steinbeisser H & De Robertis EM (1994)On the function of BMP-4 in patterning the marginalzone of the ... theirreceptors in the extracellular space, thus inhibiting ven-tralizing activities. Of these proteins, Chordin has along-range effect. In Xenopus, expression of the chordingene is localized to the dorsal...