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. 2019 Sep 9;7(3):109. doi: 10.3390/vaccines7030109

Figure 4.

Figure 4

Chemometric analysis of FTIR experimental data on the protein region (1750–1480 cm−1). Amount of variance captured by PCs (A), PCA score plot (B), loading plots for the spectral data (C), and squared correlation for the first 3 PCs for the spectral collection (D).