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. 2012 Jul 24;2(3):479–495. doi: 10.3390/metabo2030479

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© 2012 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 license (http://creativecommons.org/licenses/by/3.0/).

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Urine ¹H NMR spectra with color mapping showing the relative orthogonal signal correction-filtered partial least squares discriminate analysis (OSC-PLSDA) variable importance in projection (VIP) coefficients for sample classification. Representative spectrum is for a control animal in week 1. Expansion of different spectral regions with the VIP color coding with the TBP-treated (a,c) and the TPP-treated (b,d). Representative metabolites are labeled: A: Dibutyl phosphate, B: Acetate, C: Succinate, D: 2-Oxoglutarate, E: Citrate, F: Creatine, G: Betaine, H: Taurine, I: Urea, J: Benzoate.