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. 2019 Aug 14;24(16):2947. doi: 10.3390/molecules24162947

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Principal component analysis of Exo-SERS data sets. The 3D scatter plot of PC1 (29.19%), PC2 (15.75%), and PC3 (11.19%) for the SERS spectra obtained from eight exosome subtypes by applying the spectral range of 500–1600 cm⁻¹.