Fig. (10) Low power electron microscopic radioautogram of the adrenal medullary tissues of a young adult mouse at postnatal month 1, labeled with 3H-thymidine, showing DNA synthesis (several silver grains) in the nuclei as well as in a few mitochondria of several adrenalin cells at bottom right and several noradenalin cells at left. x 1,500. (From Nagata [49]. Courtesy of J Cell Tiss Res 9: 1793-1802, 2009).