Slippage during DNA replication can lead to expanding sections of repeating nucleotides. Watch this animation to see how this problem occurs.
This animation illustrates how mistakes made during DNA replication are repaired.
This animation shows how the protein MECP2, in conjuction with another protein complex, can act as an "on-off' switch for gene expression.
Although there are numerous kinds of cancer, all stem from alterations that allow cell division to outstrip cell demise.
Learn about what p53 does, and how interfering with its function can lead to cancer.