Fig. 3.

Expression of BMP receptor subunit mRNAs in the E16 mouse head. BMPR-IA mRNA is expressed at high levels in the trigeminal ganglion (arrow), nodose ganglion (small arrow), and DRG (arrowhead). It is also expressed by the striatum and the contiguous periventricular generative zone (small arrows). Relatively weak and diffuse expression is found in the thalamus (TH). Expression of BMPR-IB mRNA is limited to the frontal region of the periventricular generative zone (arrow) and to the olfactory epithelium (arrowhead).BMPR-II mRNA is also expressed by the periventricular generative zone (arrow). Scale bar, 1 mm.