Product Details of 2645-22-9. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 4,4-Dipyridyl Disulfide, is researched, Molecular C10H8N2S2, CAS is 2645-22-9, about Electrochemical consideration of electrostatic interaction of charged molecules with partially overlapped electric field: zwitterions and proteins. Author is Sugimoto, Yu; Fujieda, Nobutaka; Kano, Kenji.
Electrostatic interactions greatly affect the interaction and activity of ions and charged mols. In this study, electrochem. techniques were applied to evaluate the electrostatic interactions of zwitterions and proteins as charged mols. that have partially overlapped elec. field. The formal potential of a probe redox couple, [Fe(CN)6]3-/4-, was used as a measure of the electrostatic interaction between the probe ions and linear amino acids as zwitterions. The zwitterions clearly showed electrostatic interaction with [Fe(CN)6]3-/4-, but the strength was weakened by the partial overlapping of the elec. field of oppositely charged sites. Furthermore, we investigated the electrostatic interaction between proteins as multivalent polymeric ions using quinohemoprotein amine dehydrogenase and its electron accepter proteins (amicyanin, cytochrome c550, and horse heart cytochrome c). The second-order reaction rate constant (k) of the intermol. electron transfer between the proteins was electrochem. determined in various ionic strengths (I). The I dependences of k were explained not by the net charges but by the local charges around the interaction interfaces of the proteins.
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Reference:
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