A method for evaluating a fixing belt includes forming a fixing belt which includes a substrate, an elastic layer laminated on the substrate, and a mold releasing layer laminated on the elastic layer. A control unit corrects a lateral registration of a sheet whose skew is corrected by the stopper unit, based on a detection result of a detecting unit that detects a position of a side edge of the sheet, while conveying the sheet, controls the rollers not nip the sheet at least during the lateral registration, and controls rotations of the cams according to a length of the sheet. The carbohydrate fragments may be capsular oligosaccharide fragments from Streptococcus pneumoniae which may be serotypes, or Neisseria meningitidis, which may be serotype W-135 or Y. A signal output at a second voltage and a second current that is suitable for introduction to a high-impedance controller input can be obtained at a third node electrically coupled to a point between the first resistive device and the second resistive device.