Figure 4: UV absorption spectra of the CIT-HSA. The concentration of HSA was 1.5 μM while the CIT concentration corresponding to 0, 3.33, 6.67, 10, and 13.3 μM is from a to e, respectively. [HSA] = 0 μM, [CIT] = 15.0 μM. Tris buffer, pH = 7.4,  K.