Figure 1

UV–vis spectra of PC (conc. 0.2 mg ml ⁻¹ , red line) and αHisPC (conc.0.2 mg ml ⁻¹ , black line) in the native form in PBS pH 7.4 (continuous lines) and in denatured form in 1 M KOH (dashed lines). Data for PC are reproduced from [8].