FIGURE 1.

Effects of salts on TPQ_sq formation. UV-visual absorption spectra of TPQ_sq generated by anaerobic reaction with 2-PEA (1 mm) as the substrate were measured with 100 μm AGAO monomer in 100 mm HEPES, pH 6.8, in the absence (black solid line) and presence of various salts at a final concentration of 10 mm: NaCl (green solid line), NH₄Cl (blue solid line), KCl (blue broken line), Na₂SO₄ (red broken line), or NaH₂PO₄ (red solid line).