<i>INK4d</i>-Deficient Mice Are Fertile Despite Testicular Atrophy

Abstract excerpt

The INK4 family of cyclin-dependent kinase (CDK) inhibitors includes four 15- to 19-kDa polypeptides (p16(INK4a), p15(INK4b), p18(INK4c), and p19(INK4d)) that bind to CDK4 and CDK6. By disrupting cyclin D-dependent holoenzymes, INK4 proteins prevent phosphorylation of the retinoblastoma protein and block entry into the DNA-synthetic phase of the cell division cycle. The founding family member, p16(INK4a), is a...

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