The stability of methylation pattern of locus MGA in the different samples. The plots show an average methylation density for each CG across the MGA locus in tumor samples (●), normal samples (◦), and serum samples of cancer patients (▴) and of cancer-free individuals (▵). The dashed lines showed the boundary of the amplicons used to generate the data. X axis represents the arbitrary numbers that reflect the sequential positions of particular CG in the locus. Y axis represents an average methylation density.