The keys which are used to activate the machine functions are embodied as keys which are directly connected to one of the SPS inputs. The protein BAD is dephosphorylated in position Ser155. Every packet in one flow has identical values for a set of data fields in the packet. An electronic power converter is electrically connected to the electrical circuit and to an electrical bus, and an electrical storage device is electrically connected to the electrical bus. An intermediate portion between the first and second end portions is provided with a expandablecontractible portion capable of being elastically expanded or contracted in the predetermined direction. The toner conveying mechanism includes a conveying member that rotates to convey toner, an elastic member configured to contact a circumference of the conveying member, an image carrying body, and a cleaning member disposed between the elastic member and the image carrying body.