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. 2020 Mar 6;10(3):409. doi: 10.3390/biom10030409

Figure 2.

Figure 2

Fluorescence quenching effects of colonic flavonoid metabolites. Representative emission spectra of HSA (2 μM) in the presence of increasing concentrations (0, 2, 3, 4, 5, 6, and 8 µM) of 3-coumaric acid (3CA), 2,4-dihydroxyacetophenon (24DHAP), pyrogallol (PYR), and O-desmethylangolensin (DESMA) in PBS (pH 7.4; λex = 295 nm).