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Unfixed frozen sections from wt and sdc-1 null mouse tumors were evaluated by immunoflourescence microscopy. Images from serial frozen sections of representative papillomas are presented in A and B whereas C and D show representative wt and sdc-1 null SCCs. The asterisks in the merged images in A and B indicate the region shown below after 3-fold magnification. Bars in A–D = 60 μm.
