title: Proteolipid and calculus matrix calcification in vitro.
abstract: The initiator of calculus matrix calcification, in vitro, was isolated. Crude phospholipid, known to contain the factor, was separated into five fractions by column chromatography. A single protein-containing fraction induced apatite formation during incubation. The nucleating fraction was indentified as a proteolipid.
mesh_terms: D000191:Actinomycetaceae / Q000502:physiology; D002118:Calcium / Q000378:metabolism*; D003728:Dental Calculus / Q000378:metabolism*; D049671:History, 18th Century; D010743:Phospholipids / Q000502:physiology; D011510:Proteolipids / Q000502:physiology*
chemical_list: D010743:Phospholipids; D011510:Proteolipids; D002118:Calcium