Fig. 4
From: Dynamic pigmentary and structural coloration within cephalopod chromatophore organs
Spectrometric analysis of chromatophore proteins. a Enzymatically isolated squid dorsal mantle chromatophores, retaining the plasma membrane of the variously colored chromatocytes and their surrounding sheath cells (sc). Scale bar is 6.5 µm. b Proteins identified and categorized by function in the yellow, red, and brown pigment cells in squid D. pealeii dorsal and ventral mantle. c Typical morphological arrangement of chromatophores in squid skin; note the radial muscles visible around the central retracted brown chromatophore. Scale bar is 500 µm. d Categorized proteins identified within the squid chromatophore granules, pigment-extracted granules (e.g., the granule shell), and the extracted pigment along with representative SEMs (scale bar = 500 nm) and optical image of extracted pigment
