Adenosine Triphosphatase in Chloroplasts.

Adenosine triphosphatase and myopathy.

Biosynthesis and assembly of the proton-translocating adenosine triphosphatase complex from chloroplasts.

The H(+)-translocating ATPase complex of chloroplasts consists of at least eight nonidentical subunits. Five of these (alpha, beta, gamma, delta, and epsilon subunits) collectively constitute the globular extramembranous CF(1) portion of the complex. The remaining three subunits (I-III) represent the membrane-embedded portion. Biosynthesis and assembly of these subunits were studied by pulse-la...

Inhibition of Adenosine Triphosphatase Activity

Triphenylsulphonium ions inhibit mitochondrial oxidative phosphorylation and adenosine triphosphatase activity. The site of action is on the soluble F1 adenosine triphosphatase component. Triphenylsulphonium ions also inhibit electron transfer in the NAD-cytochrome b region of the respiratory chain. In both types of inhibition, triphenylsulphonium ions are effective at low concentrations, half-...

Adenosine Triphosphatase Activity in the Membranes

This investigation deals with the localization of sites of ATPase activity, especially of transport ATPase, in nerve fibers of the squid Doryteuthis plei, at the subcellular level. Splitting of ATP liberates inorganic phosphate which reacts with lead to form a precipitate in the tissue. The reaction was made on nerve fibers fixed with glutaraldehyde. Frozen slices were incubated in Wachstein-Me...

Adenosine Triphosphatase Localization in Amphibian Epidermis

The localization of ATPase(1) activity has been studied by light and electron microscopy in the epidermis of Rana pipiens, Rana catesbiana, and Bufo marinus. The reaction was carried out on skin (glutaraldehyde-fixed or fresh) sectioned with or without freezing. Best results were obtained with nonfrozen sections of fixed tissue. The incubation mixture was either a Wachstein-Meisel medium, or a ...