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Topic: Vanabins

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	Tatsuya Ueki 2003 6442
		The vanabins were found to bind vanadium(IV), and an excess of copper(II) ions inhibited the binding of vanadium(IV) to the vanabins in vitro.
		Recently, vanadium-binding proteins (vanabins) in the blood cells of the ascidian Ascidia sydneiensis samea were identified (7, 25).
		Vanabins are small cysteine-rich proteins distantly related to metallothioneins, but the repetitive patterns of cysteines in vanabins are different from that of metallothioneins (23).
	www.bionewsonline.com /b/e/tatsuya_ueki_2003_6442.htm (0 words)

	Blood - Encyclopedia Jr, free information reference for Kids
		Hemocyanin (blue) contains copper and is found in crustaceans and mollusks.
		It is thought that tunicates (sea squirts) might use vanabins (proteins containing vanadium) for respiratory pigment (bright green, blue, or orange).
		In many invertebrates, these oxygen-carrying proteins are freely soluble in the blood; in vertebrates they are contained in specialized red blood cells, allowing for a higher concentration of respiratory pigments without increasing viscosity or damaging blood filtering organs like the kidneys.
	www.encyclopediajr.com /wikiarticle/b/l/o/blood.php (0 words)

	Vanadium-binding proteins (Vanabins) from a vanadium-rich ascidian Ascidia sydneiensis samea
		Recently, we identified three vanadium-binding proteins (vanabins), previously denoted as vanadium-associated proteins (Kanda et al., 1997), from the cytoplasm fraction of vanadium-containing blood cells (vanadocytes) of the vanadium-rich ascidian Ascidia sydneiensis samea.
		Recombinant proteins of two independent but related vanabins, vanabin1 and vanabin2, bound to 10 and 20 vanadium(IV) ions with dissociation constants of 2.1 ï´ 10-5 M and 2.3 ï´ 10-5 M, respectively.
		Vanabins are the first proteins reported to show specific binding to vanadium ions; this should provide a clue to resolving the problem regarding the selective accumulation of vanadium in ascidians.
	ir.lib.hiroshima-u.ac.jp /00000024 (220 words)

	Vanabins - ZDNet
		Vanabins on the other hand have a moderate dissociation constant and do not tightly bind vanadium.
		The most convincing evidence against vanadium in use for oxygen transport is; that many ascidians and tunicates also have hemocyanin in their blood that could be assumed to handle all oxygen transport.
		Abstract of "Vanadium-binding proteins (vanabins) from a vanadium-rich ascidian Ascidia sydneiensis samea" Biochim Biophys Acta.
	vanabins.zdnet.co.za /zdnet/Vanabins (492 words)

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