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. 2021 Jun 23;6:88. doi: 10.1038/s41541-021-00344-1

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Anti-TT IgG enzymatic activity of buffy coat donors in response to heat alternated adsorbed TT (0.0025 Lf/ml): a, b TT kept at 4 weeks at 37 °C (17 donors; n = 5 independent experiments) and c, d TT kept one week at 45 °C (10 donors; n = 2 independent experiments). a, c comparison of response to not-altered vs altered adsorbed TT. b, d correlation of the enzymatic activity of anti-TT IgG in response to not-altered vs altered adsorbed TT of individual donors (each represented as a single dot). Bar graphs represent mean (± standard deviation) of the enzymatic activity means of all donors. The dotted line shows anti-TT IgG enzymatic activity of 200, the threshold of reactivity. Data were analyzed using Wilcoxon matched-pairs signed rank test and Spearman correlation. P values are depicted in the respective graphs, ns non-significant.