Assertion: mature osteoclast | /r/CapableOf | attach to mineralized bone
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text: The mature osteoclasts then attach to mineralized bone and acidify the extracellular environment at the cell-bone interface, releasing bone minerals and exposing the organic matrix to resorption by the secreted acid protease cathepsin K.14,15 Cells of the monocyte–macrophage lineage from which osteoclasts derive have long been known to be activated by hypoxia,16,17 suggesting that monocyte–