Hemovanadin is a pale green vanabin protein found in the blood cells, called vanadocytes, of ascidians (sea squirts) and other organisms (particularly sea organisms).
[2][3] The German chemist Martin Henze first detected vanadium in ascidians (sea squirts) in 1911.
[4][5] Unlike hemocyanin and hemoglobin, hemovanadin is not an oxygen carrier.
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