In the specific case of glioblastomas, these authors found proof of biallelic expression in females of KDM6A (encodes the lysine-specific demethylase 6A), KDM5C (encodes the lysine demethylase 5C), DDX3X (encodes a DEAD-box helicase 3 X-linked), and ATRX (encodes the ATRX chromatin remodeler). The gene discussed is ATRX; the disease is glioblastoma.