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. Author manuscript; available in PMC: 2012 Jun 18.
Published in final edited form as: J Am Chem Soc. 2004 Jan 21;126(2):438–439. doi: 10.1021/ja036297t

Figure 3.

Figure 3

UV–vis spectra of 1 (4 × 10−6 M) and l-cysteine (4.9 × 10−5−7.4 × 10−4 M) in deproteinized human plasma at room temperature containing 1.0 mM added glutathione (pH 9.5). Each spectrum is acquired 5 min after cysteine addition. As the concentration of l-cysteine increases, a red shift from 480 to 500 nm is observed.