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Fig. 5. BMP positively regulates Cfc expression. (A) A control stage 8 embryo hybridized for Cfc. Exogenous BMP signaling applied to the right (B) or to the left (C) enhances Cfc expression. Note that the ectopic expression is stronger in the somites. (D) Noggin application (here shown on the left) inhibits the normal expression of Cfc. (E) A transverse section through the embryo shown in B at the indicated level (arrows indicate the medial boundary of each side of Cfc expression). (F) A transverse section through the embryo shown in D at the indicated level. The red asterisk marks the position of the bead in the sections.