NR0B1 (HGNC ID, HGNC:7960; chromosomal location, Xp21.2) encodes a protein (NP_000466), also known as the dosage-sensitive sex reversal-adrenal hypoplasia congenita critical region on the X chromosome protein 1 (DAX1). Here, NR0B1 is linked to alternating hemiplegia of childhood.