Fig. 4.
CD spectra of HRP and HRP-POx: (a) Far-UV (200 to 260 nm) CD; (b) Near-UV-vis (250 to 450 nm) CD. A – HRP; B - HRP-P(MeOx-b-BuOx); C - HRP-P(EOx-b-BuOx); D - HRP-P(EtOx-co-BuOx); E - HRP-PMeOx. All samples were dissolved in PBS (PH 7.4) at the concentration of 0.5mg/ml (determined by MicroBCA assay). The modification degrees of HRP-POx are the same as those in cellular uptake studies.