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Details for Patent: 5,776,428

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Details for Patent: 5,776,428

Title: Technetium-99m labeled peptides for imaging
Abstract:This invention relates to radiolabeled peptides and methods for producing such peptides. Specifically, the invention relates to peptides, methods and kits for making such peptides, and methods for using such peptides to image sites in a mammalian body labeled with technetium-99m (Tc-99m) via a radiolabel-binding moiety which forms a neutral complex with Tc-99m.
Inventor(s): Dean; Richard T. (Bedford, NH), Buttram; Scott (Derry, NH), McBride; William (Manchester, NH), Lister-James; John (Bedford, NH), Civitello; Edgar R. (Londonderry, NH)
Assignee: Diatide, Inc. (Londonderry, NH)
Filing Date:Jun 06, 1995
Application Number:08/468,975
Claims:1. A radiolabeled peptide for imaging sites within a mammalian body, comprising a specific binding peptide having an amino acid sequence and a radiolabel-binding moiety of formula: ##STR8## wherein X.dbd.H or a protecting group;

(amino acid)=any amino acid;

the radiolabel-binding moiety is covalently linked to the peptide and wherein the radiolabel-binding moiety forms a complex with a radioisotope and the complex of the radiolabel-binding moiety and the radioisotope is electrically neutral.

2. The peptide of claim 1 wherein the amino acid is glycine and wherein X is an acetamidomethyl protecting group.

3. The peptide of claim 1 wherein the specific binding peptide and the radiolabel-binding moiety are covalently linked through one or more amino acids.

4. The peptide of claim 1 wherein the specific binding peptide is selected from the group consisting of peptides having the amino acid sequences:


(VGVAPG).sub.3 amide

(VPGVG).sub.4 amide












GGGF.sub.D.Cpa.YW.sub.D KTFTamide ##STR9## [SYNRGDSTC(S-maleimido)CH.sub.2 CH.sub.2 --].sub.3 N GGGLRALVDTLKamide



GC(VGVAPG).sub.3 amide
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