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 2 and riboflavin deficiency. Orthologous to several human genes including SLC52A2 (solute carrier family 52 member 2). [provided by Alliance of Genome Resources, Apr 2022]