blood cells no relation vanadium
Hemovanadin is a pale green vanabin protein found in the blood cells, called vanadocytes, of ascidians (sea squirts) and other organisms (particularly sea organisms). It is one of the few known vanadium-containing proteins. The German chemist  Martin Henze first detected vanadium in ascidians (sea squirts) in 1911. Unlike hemocyanin and hemoglobin, hemovanadin is not an oxygen carrier.
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