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. 2025 Aug 21;17(1):2549035. doi: 10.1080/20002297.2025.2549035

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© 2025 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.

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Figure 4. — A₂₆₀/A₂₈₀ ratios of DNA extracted from single paper points. The A₂₆₀/A₂₈₀ ratios were determined using spectrophotometric analysis. Data represent 18 samples per health condition (periodontal healthy and periodontitis-affected sites) collected from six participants for each of the three kits, except for the ZB healthy group, where one sample was excluded. The data is shown on a logarithmic scale. The red dashed line shows the ideal 260/280 ratio for pure DNA (~1.8). MN: NucleoSpin Tissue kit, MACHEREY‑NAGEL, ZB: ZymoBIOMICS DNA Miniprep kit, ZYMO RESEARCH, QB: DNeasy Blood & Tissue kit, QIAGEN.