Single motoneuron succinate dehydrogenase activity.
نویسندگان
چکیده
منابع مشابه
Single motoneuron succinate dehydrogenase activity.
We have developed a quantitative histochemical assay for measurement of succinate dehydrogenase (SDH) activity in single motoneurons. A computer image processing system was used to quantify the histochemical enzyme reaction product and to follow the time course of the reaction. The optimal concentration for each of the ingredients of the incubation medium for the SDH reaction was determined and...
متن کاملStudies on Succinate Dehydrogenase
1. Succinate dehydrogenase flavocoenzyme (“SD-flavin”), previously shown to be an SOLsubstituted riboflavin derivative containing a tertiary nitrogen homoconjugated to the flavin nucleus, was subjected to further hydrolysis and to reduction under acid conditions. Both conditions resulted in the liberation of 1 mole of histidine per mole of flavin. This proves histidine to be the covalent link b...
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The turnover number of succinate dehydrogenase from mammalian heart determined by the spectrophotometric phenazine methosulfate assay, after complete activation, is approximately 21,000 mol of succinate oxidized/min/mol of histidyl flavin at 38 degrees in relatively intact inner membrane preparations and mitochondria. Reconstitutively active soluble preparations, extracted anaerobically in the ...
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This paper examines proposals in the literature that 3-nitropropionate is a suicide inactivator of succinate dehydrogenase and that it acts by nucleophilic addition to N-5 of the covalently bound flavin component of the enzyme. With purified, soluble preparations of the enzyme, the inhibition developed slowly, and nearly complete inactivation occurred with a stoichiometric amount of 3-nitroprop...
متن کاملThe synthesis of succinate-dehydrogenase riboflavin.
Singer and Kearney"], in their early studies, recognized that the flavocoenzyme of mitochondria1 succinate dehydrogenase ("SD-flavin") [**I was a derivative of flavin-adenine-dinucleotide which was covalently bound to the protein. In cooperation with Dr. Singer's team [***I, we have attempted to elucidate the structure of this coenzyme. In the first preliminary communication I21, we concluded f...
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ژورنال
عنوان ژورنال: Journal of Histochemistry & Cytochemistry
سال: 1989
ISSN: 0022-1554,1551-5044
DOI: 10.1177/37.7.2732457