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The polychaete Pseudopotamilla occelata is the first animal revealed to contain high levels of vanadium besides ascidians. The present experiment disclosed that P. occelata has the same antigens with those in the ascidian Ascidia syndneiensis samea, which were recognized by two types of antibodies, a polyclonal antibody against vanadium-associated proteins extracted from blood cells and a monoclonal antibody against vanadocytes in the vanadium-rich ascidian A. sydneiensis samea. There is, therefore, a possibility that similar mechanism works on the accumulation of vanadium between the Polychaeta and the Ascididae.
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Uyama et al. (1997) studied this question.
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