... DOI: 10.1039/C3RA45861J (Communication) RSC Adv., 2014, 4 ... Fig. 4 shows the catalytic activity of cyt c, ie oxidation of phenol and 4-AAP with H 2 O 2 . The relative activity of ... The pore volume of cyt c immobilised on MPS sheet decreased from 0.43 to 0.39 cm 3 g −1 (ESI, Fig. ...