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. 2004 Feb;111(2):138–146. doi: 10.1111/j.0019-2805.2003.01804.x

Figure 2.

Figure 2

(a) Proinsulin-positive cells in human thymus, stained on a frozen section using streptavidin–biotin–peroxidase and the AEC substrate (red), counterstained with haematoxylin (×64 magnification). (b) Proinsulin-positive cells in human spleen, stained on a frozen section using streptavidin–biotin–peroxidase and the AEC substrate (red), counterstained with haematoxylin (×128 magnification).