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Expression of CDK2, CDK1, and CDK5 in the melanoma progression pathway. Five-µm sections, prepared from cryopreserved tissue specimens representing normal skin, benign nevus, atypical nevus, melanoma in situ and VGP and MGP melanoma were probed with antibody to (A) CDK2, (B) CDK1 or (C) CDK5 and counterstained with hematoxylin.
