MOP4 (NPAS2, Members of PAS Superfamily, 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, BHLHE9,