the activities of 4-aminobutyric-2-oxoglutaric acid transaminase (gaba-t) and succinate semialdehyde dehydrogenase (ssadh) were determined in mouse hypothalamus after peripheral injections of cholecystokinin-8 (cck-x)and/or caerulein (cln). gaba transaminase activity was measured utilizing endogenous succinate semialdellyde dehydrogenase to convert the product of gab a-t, succinate semialdehyde...

The activities of 4-aminobutyric-2-oxoglutaric acid transaminase (GABA-T) and succinate semialdehyde dehydrogenase (SSADH) were determined in mouse hypothalamus after peripheral injections of cholecystokinin-8 (CCK-X)and/or caerulein (CLN). GABA transaminase activity was measured utilizing endogenous succinate semialdellyde dehydrogenase to convert the product of GAB A-T, succinate semiald...

Succinate dehydrogenase (succinate: phenazine methosulfate oxidoreductase, EC 13.99.1) activity in crude mitochondrial fraction from pea (var. Alaska) cotyledons increased during seed imbibition to reach a maximum after about 12 hours. The increase was not inhibited by either cycloheximide or D(-)dweo-chloramphenicol. The postmicrosomal fraction from dry cotyledons, but not that from fully imbi...

A large-scale preparation of the two-subunit protein complex (QPs) that converts succinate dehydrogenase into succinate-ubiquinone reductase from cytochrome 6-c, particles is achieved by a procedure involving Triton X100 solubilization and calcium phosphate column chromatography at different pH values. The isolated two-subunit QPs contains 25 nmol of cytochrome basofmg of protein and is able to...

SUCCINATE DEHYDROGENASE (SUCCINATE: phenazine methosulfate oxidoreductase, EC 1.3.99.1) activity in crude mitochondrial fraction from pea (var. Alaska) cotyledons increased during seed imbibition to reach a maximum after about 12 hours. The increase was not inhibited by either cycloheximide or d(-)threo-chloramphenicol. The postmicrosomal fraction from dry cotyledons, but not that from fully im...

The open reading frames sll1625 and sll0823, which have significant sequence similarity to genes coding for the FeS subunits of succinate dehydrogenase and fumarate reductase, were deleted singly and in combination in the cyanobacterium Synechocystis sp. strain PCC 6803. When the organic acid content in the Deltasll1625 and Deltasll0823 strains was analyzed, a 100-fold decrease in succinate and...

It has been shown previously (1) that submitochondrial particles exposed to sonic oscillation at an alkaline pH and then treated with 1% silicotungstate were depleted of several coupling factors (F1,l Fz, Fs, and F5) as well as succinate dehydrogenase. Succinoxidase activity in these STA-particles was negligible but could be completely restored by addition of partially purified succinate dehydr...

The alkaloids from Chelidonium majus L. which had a significant inhibitory effect in mitochondrial respiration were those which contain a positive charge due to a quaternary nitrogen atom, i.e., chelerythrine, sanguinarine, berberine and coptisine, both with malate+glutamate or with succinate as substrates. When malate+glutamate was used as substrate, chelerythrine and berberine, which contain ...

Succinate dehydrogenase has been isolated in a highly purified form from succinate-coenzyme Q reductase preparations. The enzyme contains 1 mole of covalently bound flavin, 8 g atoms of iron, and 8 moles of acid-labile sulfide per 150,000 g of protein. It catalyzes succinate oxidation in the presence of phenazine methosulfate as electron acceptor at a rate of 26 to 32 pmoles per min X mg of pro...