Peculiar structure and location of 9p21 homozygous deletion breakpoints in human cancer cells

Abstract excerpt

The CDKN2A tumor-suppressor gene in chromosome band 9p21 encoding CDKN2A (also known as p16, INK4A), a negative regulator of cyclin-dependent kinases, and p14(ARF1), an activator of TP53, is inactivated in many human cancers by point mutations, promoter hypermethylation, or deletions. Homozygous deletions predominate in certain cancer types (e.g., bladder cancers). To understand why deletions are unusually...

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