Figure 3From: Persistent expression of BMP-4 in embryonic chick adrenal cortical cells and its role in chromaffin cell developmentDouble in situ hybrization for bone morphogenetic protein-4 (BMP-4; blue) and tyrosine hydroxylase (TH; red) on a section of the adrenal gland of a developmental stage S35 (embryonic day 9) chick embryo. Note that BMP-4 is expressed in the adrenal cortical (interrenal) cells surrounding the TH-positive adrenal chromaffin cells. Bar: 100 μm.Back to article page