Molecules of haemocyanin protein

Molecules of haemocyanin protein

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Credit: DR LINDA STANNARD, UCT/SCIENCE PHOTO LIBRARY

Caption: Haemocyanin. Coloured transmission electron micro- graph (TEM) of molecules of haemocyanin, a respiratory protein and pigment found in molluscs and arthropods. Like haemoglobin in mammals, haemocyanin is an oxygen carrying molecule. Each molecule is barrel-shaped appearing rounded end-on but oblong with transverse striations when seen from the side. Here, the haemocyanin molecules are from a marine whelk Burnupena cincta. They are a copper- containing protein (non-porphyrin) that occurs in solution in mollusc haemolymph "blood". It is blue when oxygenated, colourless when de- oxygenated. Magnification: unknown.

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Keywords: biochemical, biochemistry, burnupena cincta, chemical, chemistry, compound, compounds, copper-containing protein, haemocyan, haemocyanin, haemolymph protein, molecule, molecules, mollusc, protein, proteins, proteomics, respiratory protein

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