Part of the ABC transporter complex Rv2686c/Rv2687c/Rv2688c involved in fluoroquinolones export. Confers resistance to ciprofloxacin and, to a lesser extent, norfloxacin, moxifloxacin and sparfloxacin. Probably responsible for the translocation of the substrate across the membrane. The complex is composed of 2 ATP-binding proteins (Rv2688c) and 2 transmembrane proteins (Rv2686c and Rv2687c).