In the right panel, vertical bars represent the restriction enzyme recognition sites of Sma I and Xma I (5’-CCCGGG-3’). In the DNA segment shown, the control sample is methylated at only two of the six sites, while the disease (test) sample is methylated at three.
This image is linked to the following Scitable pages:
How do complex adult-onset disorders take place? The methylation of DNA sequences is an important component of epigenetic control that can be inherited or occur over time.
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