Part of the high-affinity ABC transporter complex FrcBCA involved in fructose uptake. Is also a high-affinity transporter for ribose and mannose. Binds fructose, ribose and mannose. The complex is composed of two ATP-binding proteins (FrcA), two transmembrane proteins (FrcC) and a solute-binding protein (FrcB). Induced by fructose. Belongs to the bacterial solute-binding protein 2 family.