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Examples of immunohistochemistry using antibodies against Siglec-7 and Siglec-13 on human and chimpanzee tissues (see Materials and Methods for detail). (A) No difference in expression of Siglec-7 in splenic blood cells. There is markedly increased expression of Siglec-7 in human pancreatic islets. (B) Siglec-13 expression in chimpanzee skin and prostatic epithelium. The gene-encoding Siglec-13 is completely deleted in humans. Scale bars = 100 μm.
