An illumination optical system projects an illumination light onto an observation object via an objective lens. The diameter of jet aperture portions formed on the plate body and the diameter of water-repellant film apertures formed on the water-repellant film so as to connect with the nozzle apertures are the same diameter R3, so the ink jet flow can be accurately controlled. Herein, screening assays are described to identify CDK mutant proteins and the uses of these mutant proteins as tumor vaccines is described. The light emitting diode is configured to control the intensity of the emission falling in the primary wavelength range to control the color point of the white light generated by mixing the emissions falling the second wavelength range and the third wavelength range. The different cell types are then arranged in the mosaic pattern. A first end of the supporting arm is carried by a mounting member and is connected to the transmission line pole via the base plate, while the second end can receive a conductor with a connector.