Figure 2.

Quantification of effects of ACh and genistein on dynamic iridescence. (a) Dose-dependency of dynamic iridescence on genistein, a broad-spectrum protein kinase inhibitor. Brightness is in arbitrary units. (b) Reflectance of Loligo skin as a function of time following the simultaneous addition of ACh and genistein. (c) Reflectance of Loligo skin as a function of time following the addition of ACh alone. While error bars are not possible because no two patches of squid skin have identical iridophore patterning, the results shown here are representative of a typical patch of squid skin.