Metalloprotein
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Metalloprotein is a generic term for a protein that contains a metal ion cofactor. A large proportion of all proteins are part of this category. For instance, at least 1000 human proteins contain zinc
EF-hand motif
Hemocyanin
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Hemocyanins are proteins that transport oxygen throughout the bodies of some invertebrate animals. These metalloproteins contain two copper atoms that reversibly bind a single oxygen molecule. They ar
Metalloprotein
…oxidation of the reduced binuclear center to produce bound peroxide (OOH−). The mechanism of oxygen uptake and release have been worked out in detail. Hemocyanins carry oxygen in the blood of most mollusks, and some arthropods such as the horseshoe crab. They are second only to hemoglobin in biological popularity…
Single oxygenated functional unit from the hemocyanin of an octopus
Crystal structure of hexameric haemocyanin from Panulirus interruptus refined at 3.2 angstroms resolution
crystallographic analysis of oxygenated and deoxygenated states of arthropod hemocyanin shows unusual differences
The underside of the carapace of a red rock crab (Cancer productus). The purple coloring is caused by hemocyanin.