2006
DOI: 10.1016/j.jcis.2006.07.070
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Structural and redox properties of mitochondrial cytochrome c co-sorbed with phosphate on hematite (α-Fe2O3) surfaces

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Cited by 28 publications
(18 citation statements)
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“…In previous studies (Khare et al, 2005(Khare et al, , 2006a with cytochrome c (not from DMRB) and hematite electrodes, we observed redox peaks at the expected potentials for the native state of the protein and, under some circumstances (such as with the addition of denaturant), for unfolded states of the protein as well. Cytochrome c could also be inactivated such that no redox peaks were observed.…”
Section: Voltammetric Characteristicsmentioning
confidence: 57%
“…In previous studies (Khare et al, 2005(Khare et al, , 2006a with cytochrome c (not from DMRB) and hematite electrodes, we observed redox peaks at the expected potentials for the native state of the protein and, under some circumstances (such as with the addition of denaturant), for unfolded states of the protein as well. Cytochrome c could also be inactivated such that no redox peaks were observed.…”
Section: Voltammetric Characteristicsmentioning
confidence: 57%
“…It is known that ions present in protein-soil solutions can interact with both mineral surfaces and proteins to influence surface adsorption capacity as well as the adsorbed protein conformation. For example, monovalent cations in solution can inhibit protein adsorption to mica [29], and phosphate can stabilize protein structure during adsorption [30], as well as retard adsorption and increase the adsorbed protein footprint [31]. In addition, phosphate has been shown to compete with negatively-charged proteins when binding to certain surfaces [32], but conversely, the binding of four proteins to montmorillonite and kaolinite clays increased in phosphate buffer compared to DI water [33].…”
Section: Discussionmentioning
confidence: 99%
“…when net charges are minimal, indicate that hydrophobic interactions dominate the attachment to the surface in these cases. Adsorption of cytochrome c from horse heart (pI = 10-10.5) to hematite (pI = 8.4) was limited to a narrow pH range between pH 8.5 and 10 that corresponds to positive charges on the protein and negative charges on hematite [ 63 , 64 ]. In this case, the driving force for surface attachment seemed to be electrostatic interaction.…”
Section: Bioengineered Hematite Pec Cellsmentioning
confidence: 99%