<i>D</i>. <i>pealeii</i> dorsal mantle tissue immunolabeled with anti-rhodopsin and anti-retinochrome, and imaged in the chromatophore layer.

<p>(A) Rhodopsin (green) labeling only; (B) retinochrome (red) labeling only. (C) Overlap of rhodopsin and retinochrome labeling in the chromatophore membrane (m), radial muscle fibers (r), and sheath cells (sc) appears yellow. Blue shows autofluorescence of the tissue. Scale bar, 25μm.