vanadium chromagen
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Vanadium — (IPAEng|vəˈneɪdiəm) is a chemical element that has the symbol V and atomic number 23. A soft and ductile element, vanadium naturally occurs in about 65 different minerals and is used mainly to produce certain alloys. It is one of the 596 elements … Wikipedia
Vanabins — (also known as vanadium associated proteins or vanadium chromagen) are a specific group of vanadium binding metalloproteins. Found only in the blood of some ascidians and tunicates (sea squirts), these organisms are able to concentrate vanadium… … Wikipedia