Figure 48.

Myoglobin immunostaining in the skin (a) and pancreas (b) using a commercial rabbit antiserum. Rabbit antiserum available from Agilent/Dako may contain natural antibodies against intermediate filament proteins. In the skin, epidermal keratinocytes, vascular endothelial cells, and smooth muscle cells of erector pili are weakly stained. In the pancreas, some islet cells are faintly immunostained by the incidentally contaminating antibodies. The nuclei in panel (b) are counterstained with methyl green.