NPAS2 (NPAS2, BHLHE9, MOP4, PASD4, Neuronal PAS domain-containing protein 2, Neuronal PAS2, Basic-helix-loop-helix-PAS protein MOP4, Class E basic helix-loop-helix protein 9, bHLHe9, Member of PAS protein 4, PAS domain-containing protein 4)