Enables riboflavin transmembrane transporter activity. Involved in riboflavin transport. Is integral component of plasma membrane. Human ortholog(s) of this gene implicated in Brown-Vialetto-Van Laere syndrome 1 and Fazio-Londe disease. Orthologous to human SLC52A3 (solute carrier family 52 member 3). [provided by Alliance of Genome Resources, Apr 2022]