Research Article
A Highly Selective Colorimetric Sensor for Cysteine in Water Solution and Bovine Serum Albumin
Figure 3
The color change of 2-bromonaphthalene-1,4-dione (2 × 10−5 mol⋅L−1) in ethanol-HEPES solution (5 : 5, v/v, pH of 7) in the presence of 1 equiv. of CySH. (a) Absence of amino acid and (b) CySH.
| (a) |
| (b) |