The present invention relates generally to nucleic acid molecules expressed at least in the hypothalamus, liver or pancreas identified using differential display techniques under differing physiological conditions. The luminescent device includes a circuit board connected to the electronic product, a luminescent unit mounted on the circuit board, an integrated module that controls the luminescent unit and a trigger that receives trigger signal and sends control signal to said integrated module. The back band and the bottom band are formed of material having substantially the same elasticity.