[Cu+2:1].[Cu+2].[Cu+2].[Cu+2].[Zn+2:5].[Zn+2].[Zn+2].[Zn+2].[Sn].Cl.[Tc:11]([O-])(=O)(=O)=O>>[Tc:11].[Cu+2:1].[Cu+2:1].[Cu+2:1].[Cu+2:1].[Zn+2:5].[Zn+2:5].[Zn+2:5].[Zn+2:5]99MTc-labeled orgotein obtained by adding to 1-10 mg. dry samples of orgotein, 2 tin shot pellets (shiny), 1.0 ml. 0.02N HCl and 0.5 ml. pertechnetate (5-20 mCi) followed by 10 minutes incubation at room temperature and thereafter, when neutralization prior to injection was desired, followed by 1 ml. of 0.02N Na3CO3, was employed in the experiments.
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