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. 2017 Dec 6;7:17070. doi: 10.1038/s41598-017-17381-3

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© The Author(s) 2017

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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Secondary structural characteristics of SIRT2 and its complexes with tubulin and TPPP/p25 as detected by far-UV CD spectroscopy. (a) Normalized CD spectrum of SIRT2 (bold line), TPPP/p25 (solid line) and tubulin (dashed line) (n = 3); (b) Difference spectrum of SIRT2-tubulin (bold line), SIRT2-TPPP/p25 (solid line) and tubulin-TPPP/p25 (dashed line) (n = 3). Difference ellipticities were calculated by subtracting the ellipticities of the individual protein from that of their complexes. Concentrations of the proteins: 16 μM SIRT2, 4 μM TPPP/p25 and 1 μM tubulin.