Figure 3
From: Molluscan mega-hemocyanin: an ancient oxygen carrier tuned by a ~550 kDa polypeptide
Transmission electron microscope images of negatively stained gastropod hemocyanins. (a) KLH2 (from Megathura crenulata), showing typical didecamers (double arrowhead), typical tridecamers build from a decamer (arrowhead) and a didecamer (double arrowhead), and a larger multidecamer. (b) Leptoxis carinata hemocyanin; note exclusive presence of mega-tridecamers (triple arrow). (c) Terebralia palustris hemocyanin, showing mostly mega-tridecamers (triple arrow), but also typical didecamers (double arrowhead). (d) Melanoides tuberculata hemocyanin, showing a mixture of mega-decamers (arrow), mega-didecamers (double arrow) and mega-tridecamers (triple arrow).