In respect to the observed results, we analyzed the methylation of the CGI of AATK in eight glioblastoma cell lines (LN229, U343, U118, U87MG, T98G, A172, U251, LNZ308), one glioma (A764) and one astrocytoma (SNB19) cell line (Fig. S1). Here, AATK is linked to astrocytoma (excluding glioblastoma).