Required for the transport of riboflavin to the developing oocyte. Yolk RBP is synthesized in the liver; egg-white RBP is synthesized in the oviduct. Plasma and yolk RBPS have the same carbohydrate components, whereas egg-white RBP has a different, ovomucoid-type carbohydrate chain. Plasma RBP has the same C-terminal sequence as the egg-white RBP, which suggests that the C-terminal residues are cleaved off upon incorporation into the oocyte. Belongs to the folate receptor family.