Technetium-99m labeling of proteins

Details Technetium-99m labeling of proteins Technetium-99m labeling of proteins

C - Chemistry, Metallurgy

07

K

C07K 16/00 (2006.01) A61K 51/10 (2006.01) C07B 59/00 (2006.01) C07K 1/13 (2006.01) A61K 49/02 (1990.01)

Patent

CA 2104943

2104943 9215333 PCTABS00016 A method for attaching technetium-99m to proteins using reducing metal reagents to achieve binding to high affinity binding sites and high specific activity. The reagents play a dual role under the given experimental conditions by reducing disulfide bonds in the proteins to sulfhydral groups suitable for binding to technetium, and reducing pertechnetate from Tc(VII) to Tc(III) or Tc(V). Reduction of disulfide on the protein is conducted initially with an excess of reducing metal reagent, a pertechnetate reagent is added at the end of the protein reduction reaction and allowed to continue to reduce the technetium. Thereafter a chelator scavenger is added to remove poorly bound or unbound technetium.

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