Figure 9

(A-E) Electron micrographs of sympathetic ganglia at the upper thoracic level (A-D) and of the adrenal gland (E) of embryonic day (E)8 chick embryos: (A,C,E) control embryo; (B,D) embryo that was transplanted with bone morphogenetic protein-4 (BMP-4)-expressing fibroblasts at E2. Note that two major types of sympathoadrenal cells exist in sympathetic ganglia of both control and BMP-4 overexpressing embryos: cells without or with small granules in the cell body (A,B), and cells with large granules (C,D). Bar: 2 μm.