Enables prostaglandin-D synthase activity and retinoid binding activity. Involved in prostaglandin biosynthetic process and response to glucocorticoid. Located in Golgi apparatus and extracellular space. Biomarker of sensorineural hearing loss and type 2 diabetes mellitus. Human ortholog(s) of this gene implicated in carotid artery disease. Orthologous to human PTGDS (prostaglandin D2 synthase). [provided by Alliance of Genome Resources, Apr 2022]