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. 2021 Sep 30;11:19422. doi: 10.1038/s41598-021-97236-0

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© The Author(s) 2021

Open Access This 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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The V56B2 central lysine linker is cleaved by trypsin and in intestinal supernatants. V56B2 was incubated at 37 °C with immobilised trypsin (A), 1/1,000 diluted mouse small intestinal supernatant (MSIS) (B) or human faecal supernatant (HFS) (C). Samples were taken for SDS-PAGE analysis at selected time intervals, shown in minutes (horizontal numbers). Equal volumes were loaded per lane. ‘St’ is undigested V56B2 standard. L = protein standard EZ-Run Prestained Ladder. MW = Molecular weight in kDa (vertical numbers).