Bianco P, Haladjian J, Loutfi M, Bruschi M
Biochem Biophys Res Commun. 1983 Jun 15;113(2):526-30. doi: 10.1016/0006-291x(83)91757-6.
Redox properties of cytochrome c553(550) from Desulfovibrio desulfuricans Norway (Eo' = 0.04 + 0.02 V/NHE) and cytochrome c551 from P. aeruginosa (Eo = 0.25 +/- 0.02 V/NHE) are compared with those of some monohemic c-type cytochromes. The pK value for the equilibrium between the pH-dependent forms of cytochrome c553(550) (pK = 10.3 +/- 0.1) has been also determined. It is to be noted that the difference between redox potentials can extend to nearly 250 mV, though the axial heme ligands are identical. Structural reasons have to be invoked to explain these variations.
对来自挪威脱硫脱硫弧菌的细胞色素c553(550)(Eo' = 0.04 ± 0.02 V/NHE)和铜绿假单胞菌的细胞色素c551(Eo = 0.25 ± 0.02 V/NHE)的氧化还原性质与一些单血红素c型细胞色素的氧化还原性质进行了比较。还测定了细胞色素c553(550)的pH依赖性形式之间平衡的pK值(pK = 10.3 ± 0.1)。需要注意的是，尽管轴向血红素配体相同，但氧化还原电位之间的差异可延伸至近25 mV。必须援引结构原因来解释这些变化。
