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Gallium-67 citrate

(Science: radiology) analogue of ferric iron, decay: by electron capture to ground state of Zn-67, energy levels: 92 kev (40%); 184 kev (23%); 296 kev (21%), physiological half life: 3.3 days (78 hr), biological half life: 2-3 weeks, binding sites: serum: transferrin, haptoglobin, albumin, globulins, tissue: lactoferrin, PMN's (viable and nonviable), lymphocytes, macrophages, bacteria and fungi, tumour cell-associated transferrin receptor see: gallium: indications