Abstract: Radiolabeled anti-LAG3 antibodies and their use in immuno-PET imaging are provided herein. Included are methods of detecting the presence of LAG3 proteins in a patient or sample.

Abstract: Anti-CD8 antibodies, radiolabeled anti-CD8 antibodies, fluorescently labeled anti-CD8 antibodies and their use in imaging are provided herein. Included are methods of detecting the presence of CD8 proteins in a subject or sample.

Abstract: Anti-CD8 antibodies, radiolabeled anti-CD8 antibodies, fluorescently labeled anti-CD8 antibodies and their use in imaging are provided herein. Included are methods of detecting the presence of CD8 proteins in a subject or sample.

Abstract: Radiolabeled anti-LAG3 antibodies and their use in immuno-PET imaging are provided herein. Included are methods of detecting the presence of LAG3 proteins in a patient or sample.

Abstract: Anti-CD8 antibodies, radiolabeled anti-CD8 antibodies, fluorescently labeled anti-CD8 antibodies and their use in imaging are provided herein. Included are methods of detecting the presence of CD8 proteins in a subject or sample.

Abstract: Radiolabeled anti-LAG3 antibodies and their use in immuno-PET imaging are provided herein. Included are methods of detecting the presence of LAG3 proteins in a patient or sample.

Abstract: Radiolabeled anti-LAG3 antibodies and their use in immuno-PET imaging are provided herein. Included are methods of detecting the presence of LAG3 proteins in a patient or sample.

Abstract: Anti-CD8 antibodies, radiolabeled anti-CD8 antibodies, fluorescently labeled anti-CD8 antibodies and their use in imaging are provided herein. Included are methods of detecting the presence of CD8 proteins in a subject or sample.

Abstract: Anti-CD8 antibodies, radiolabeled anti-CD8 antibodies, fluorescently labeled anti-CD8 antibodies and their use in imaging are provided herein. Included are methods of detecting the presence of CD8 proteins in a subject or sample.

Abstract: Radiolabeled anti-LAG3 antibodies and their use in immuno-PET imaging are provided herein. Included are methods of detecting the presence of LAG3 proteins in a patient or sample.

Abstract: Disclosed herein, the parental antibodies from the hybridomas YTS 169.4.2.1 (YTS169) and 2.43 were engineered into minibody and diabody fragments. Both the YTS and 2.43 antibodies bind mCD8+. However, they differ in that the YTS 169 antibodies bind both Lyt2.1 and Lyt2.2 while the 2.43 antibodies bind an epitope that is Lyt2.2 specific. These novel minibodies and diabodies retained their antigen specificity as shown by flow cytometry and ImmunoPET imaging. Most importantly, both the 2.43 and YTS169 minibodies and diabodies produced high contrast ImmunoPET images of CD8+ lymphoid organs at only four hours post-injection.

Abstract: Bioconjugates for use in imaging are disclosed include a linker sequence fused to a polypeptide capable of binding a target in a biological system. The linker sequence is designed so that it is capable of being radiolabelled, e.g. with a complex comprising a radionuclide, via a free cysteine residue and the polyhistidine sequence in the label that are both capable of simultaneously binding to a complex comprising the radionuclide. These interactions can improve significantly the rate and efficiency of radiolabelling compared to either protein with the His-tag or the free cysteine alone. Optionally, the free cysteine residue provides a site which can be covalently bonded to a moiety such as a second label, in a site-specific manner.