Fig. 1.

Hepatocytes from euthermic (a), hibernating (b) and arousing (c) hazel dormice; immunolabelling with anti-FAS antibody. The enzyme is distributed in the cytosol (arrows) in all three seasonal phases considered; however, in hibernation and arousal the signal is much lower than in euthermia. Mitochondria (m) are devoid of gold grains in euthermia and hibernation, whereas in arousing animals they show a weak but significant labelling. L, lipid droplet. The gold grain contrast was digitally enhanced by using Adobe photoshop. Bars: 0.5 µm.