Fluorescent deconvolution light micrograph of a section through a dedifferentiating cardiomyocyte with neuropeptides (red) bound to it. Cardiomyocytes are the muscle cells (myocytes) that make up the cardiac muscle of the heart. Neuropeptides are small proteins that modulate the transmission of electrical signals between nerve cells. Dedifferentiation is the reversion of a specialised cell or tissue to an unspecialised form.