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. 2024 Nov 20;14:28792. doi: 10.1038/s41598-024-80457-4

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© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, 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 you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. 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-nc-nd/4.0/.

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Fig. 4 — Amino acid mutation map of HA protein. (A)The amino acid sequence mutation labeling diagram of HA protein of H1N1 swine influenza virus. The size of the letter indicates the degree of conservation of the amino acid. A lar letter indicates that that amino acid at this site is more conservative. (B) 3D structural diagram of HA protein. Mutation sites are labelled using red.