title: Calcium and phosphorus accumulation in Spirostomum ambiguum.
mesh_terms: D001345:Autoradiography; D002118:Calcium / Q000378:metabolism*; D002127:Calcium Isotopes; D016798:Ciliophora / Q000378:metabolism*; D008858:Microscopy, Phase-Contrast; D010758:Phosphorus / Q000378:metabolism*; D010759:Phosphorus Isotopes
chemical_list: D002127:Calcium Isotopes; D010759:Phosphorus Isotopes; D010758:Phosphorus; D002118:Calcium