An imaging apparatus includes an imaging unit, a display unit, an interested-position obtaining unit, a zoom operation obtaining unit and an image-processing unit. Accordingly, if a decoding error occurs due to bit error in the bit stream, propagation of picture quality deterioration in time can be suppressed, so that excellent decoding of digital moving image signal is realized. The at least one cell is transformed with a recombinant DNA including a nucleic acid encoding a GPCR and the nucleic acid is expressed.