Figure 6A shows the heat map of DNA methylation subtype (syn1701558) (cluster 1 to 6, the lowest to the highest), PLK2 expression (RNAseq-IlluminaHiSeq), PLK2 DNA methylation (methylation 450k), CpG island methylation phenotype (including G-CIMP and non-G-CIMP) in GBM. The gene discussed is PLK2; the disease is glioblastoma.