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. 2023 Feb 9;15(2):590. doi: 10.3390/pharmaceutics15020590

Figure 4.

Figure 4

ATR-IR spectra of L-methionine (green), sodium methionine (black), and crystallized zinc methionine complex Zn(Met)2(SO4)x·nH2O (dark blue). Insert: difference of IR spectra of synthesized (red) and crystallized (black) complexes and methionine.