Ga-labeling of immunoglobulin G with high specific radioactivity.

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To obtain radiogallium labeled immunoglobulin G with a high specific radioactivity for in vitro use, a 67Ga source was purified by extraction from 67Ga-gallium citrate with butyl acetate, and a 67Ga-labeling solution was produced. This solution was then used to label a deferoxamine-immunoglobulin G conjugate. Both a very high specific radioactivity(872±56 MBq/mg) and a high labeling efficiency (94.0%) were achieved.

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