(IMAGE) Tokyo Medical and Dental University Caption Transformation of a salt of calcium ions and phosphate esters into hydroxyapatite mediated by alkaline phosphatase (ALP) Credit Department of Inorganic Biomaterials, TMDU Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.