Fig. 2

Heterogeneous methylation of the DAPK1 and MGMT promoters in some tumor tissues. Normalized melting curves for DAPK1 (a) and MGMT (c) and corresponding derivative plots (negative first derivative of the melting curves; b and d). Tumor tissue from patients 2, 13 and 15 (a and b) and tumor tissue from patients 7, 13 and 15 (c and d)