Oxidative phosphorylation in intact cyanobacteria

Modelling of oxidative phosphorylation in isolated mitochondria and intact cells

Oxidative Phosphorylation and Ultrastructural Transformation in Mitochondria in the Intact Ascites Tumor Cell

We have examined the ultrastructure of mitochondria as it relates to energy metabolism in the intact cell. Oxidative phosphorylation was induced in ultrastructurally intact Ehrlich ascites tumor cells by rapidly generating intracellular adenosine diphosphate from endogenous adenosine triphosphate by the addition of 2-deoxyglucose. The occurrence of oxidative phosphorylation was ascertained indi...

Effect of Potassium and Valinomycin on Oxidative Phosphorylation in Intact Beef Heart Mitochondria and Submitochondrial Particles’

Beef heart mitochondria and submitochondrial particles have been used to measure parameters of oxidative phosphorylation with respect to varying concentrations of potassium and valinomycin. In’ the absence of valinomycin, intact mitochondria showed little response to potassium. The presence of valinomycin caused the following response of intact mitochondria to increasing potassium concentration...

KaiA-stimulated KaiC phosphorylation in circadian timing loops in cyanobacteria.

Cyanobacterial clock proteins KaiA and KaiC are proposed as positive and negative regulators in the autoregulatory circadian kaiBC expression, respectively. Here, we show that activation of kaiBC expression by kaiA requires KaiC, suggesting a positive feedback control in the cyanobacterial clockwork. We found that robust circadian phosphorylation of KaiC. KaiA was essential for in vivo KaiC pho...

Respiratory Enzymes in Oxidative Phosphorylation

In a complex enzymatic sequence the site of action of substrates and inhibitors is clearly marked by the way they affect the steady state concentrations of the components of the system (1). Antimycin A, for example, inhibits respiration in the succinic oxidase system (2) and at the same time increases the steady state reduction of cytochrome b and decreases that of cytochromes c, a, and aa (3)....