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. 2023 Aug 11;24(16):12670. doi: 10.3390/ijms241612670

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Reduction in H2 relaxin to B7-33. (A) NMR structure of H2 relaxin (PDB: 2MV1), with the A-chain shown in blue and B-chain shown in green; the A-chain contains one intra-chain disulfide bond and is attached to the B-chain via two inter-chain disulfide bonds. (B) Intermediate B-chain peptide, containing C11S and C23S modifications; the N-terminal sequence that is removed is colored pink to generate B7-29. (C) B7-33, with the B1-33 H2 relaxin C-terminal residues (KRSL), is shown in blue for clarity.