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Arch Biochem Biophys. 1984 May 15;231(1):1-8.

Can biological calcification occur in the presence of pyrophosphate?


It was shown that it is apparently impossible for any calcification to occur in a system which contains a constant, physiological concentration of inorganic pyrophosphate. These results give further support to the earlier suggestion that inhibitors of calcium phosphate crystal growth must be removed from or denied access to the site of calcification to allow for the normal formation of the mineral phase. This study also suggests that the means of assessing the relative importance of a calcification inhibitor should be altered, since it is the equilibrium concentration of an inhibitor, and not its initial concentration in an assay system, which has physiological relevance.

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