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Increased expression of cell cycle proteins in breast tumors derived from Cdk4 (R24C/R24C):MMTV-v-Ha-ras mice. Protein extracted from normal (N) and mammary tumor tissues (T) of Cdk4(R24C/R24C):MMTV-v-Ha-ras mice was analyzed for Cdk4, Cdk6, Cdk2, cyclin D1, and P-pRb (Ser780) by Western blot analysis.
