title: Electrochemical reduction of horse heart ferricytochrome c at chemically derivatized electrodes.
abstract: Platinum or gold electrodes derivatized with an N,N'-dialkyl-4,4'-bipyridinium reagent can be used to reduce horse heart ferricytochrome c, whereas reduction doses does not occur at the "naked" electrodes. From 3 to 17.7 millimoles per liter, the reduction of ferricytochrome c is mass transport-limited at electrode potentials more negative than about -0.6 volt against a saturated calomel reference electrode. Data for the photoreduction of ferricytochrome c at derivatized p-type silicon photocathodes show directly that the rate of reduction is mass transport-limited. Use of derivatized electrodes may allow convenient manipulation and analysis of biological molecules that do not ordinarily respond at conventional electrodes.
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives; D000818:Animals; D003574:Cytochrome c Group; D004563:Electrochemistry; D004566:Electrodes; D005290:Ferric Compounds; D006736:Horses; D010084:Oxidation-Reduction
chemical_list: D003574:Cytochrome c Group; D005290:Ferric Compounds; D015082:2,2'-Dipyridyl