The inhibitory effect of phosphonates on the formation of calcium phosphate crystals in vitro and on aortic and kidney calcification in vivo.
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Biomedical subjects
Publications and source records attributed to S Bisaz.
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1. A purified preparation of alkaline phosphatase from calf-intestinal mucosa was phosphorylated by (32)P-labelled PP(i) at a serine residue on the enzyme. Under the conditions employed, up to 0.15mum-labelled sites were obtained from 1mum-[(32)P]PP(i). 2. The phosphorylated enzyme was labile, the rate of dephosphorylation being similar to the overall rate of substrate hydrolysis. 3. A stopped-flow technique was used to determine the number of phosphomonoesterase active sites, which agreed with the number of (32)P-labelled sites. 4. It is concluded that calf-intestinal alkaline phosphatase is both a phosphomonoesterase and a pyrophosphatase.
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