DRD2 and schizophrenia: In addition, multiple animal models and population-based evidence have been published for dopamine receptor D2 (DRD2) and gamma-aminobutyric acid type A receptor subunit alpha 5 (GABRA5) being associated with brain-related disorders and traits, including schizophrenia, bipolar disorder, Parkinson’s disorder, and neurotransmission (Prisciandaro et al., 2017; Escamilla et al., 2018; Mundorf et al., 2021; Zhang et al., 2021).