The function of DRD2 (dopamine receptor D2, ENSG00000149295) is as follows. Dopamine receptor whose activity is mediated by G proteins which inhibit adenylyl cyclase (PubMed:21645528, PubMed:39103320). Positively regulates postnatal regression of retinal hyaloid vessels via suppression of VEGFR2/KDR activity, downstream of OPN5 (By similarity). {ECO:0000250|UniProtKB:P61168, ECO:0000269|PubMed:21645528, ECO:0000269|PubMed:39103320}.