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0 IntroductionrnMP-11 is obtained from pepsin digestion of cytochrome c.It retains amino acid residues 11-21 of cytochrome c.It is considered a good model of c-type heme enzymes and peroxidases.So far,some methods have been used to immobilize MP-11 on electrodes,such as mixing up with graphite paste[1],covalently combining to the thiol or cystamine monolayer self-assembled at the gold electrode[2,3].This paper reports that MP-11 convalently bound on a glass carbon electrode through glutaraldehyde coupling of the peptide to a hydrazino-alkoxysilane exhibits high electrocatalytic activity for the reduction of H2O2.