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. 2022 Mar 4;49(9):3269–3276. doi: 10.1007/s00259-022-05744-6

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Structures of [¹⁷⁷Lu]Lu-PSMA-617 and [¹⁷⁷Lu]Lu-PSMA I&T, demonstrating underlying differences of both agents. Only the urea-binding motif of the two peptides is identical. For [¹⁷⁷Lu]Lu-PSMA-617, the peptide is linked to a DOTA chelator, while for [¹⁷⁷Lu]Lu-PSMA I&T, a DOTAGA chelator is used