Titanium is a light, strong, corrosion resistant metal with many industrial uses. No biological role for titanium is known. Anacystis nidulans accumulated titanium when starved in the presence of TiCl₄ and the accumulated titanium was found to be associated with polyphosphate (Crang and Jensen, 1975). The mechanism of titanium uptake was not determined.

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Crang RE, Jensen TE. Incorporation of titanium in polyphosphate bodies of Anacystis nidulans. J Cell Biol. 1975;67:80a.