منابع مشابه
Studies on adrenal steroid hydroxylases. The reactivity of triphenyl phosphine with labile sulfur in adrenal iron-sulfur protein (adrenodoxin).
The labile sulfur of adrenodoxin was attacked by a nucleophile, triphenyl phosphine. The product was triphenyl phosphine sulfide regardless of the presence of 02. The stoichiometry between labile sulfur which disappeared and triphenyl phosphine sulfide formed was found to be 1: 1. The initial rate of the reaction follows second order kinetics with a rate constant of 2 to 3 X lo3 M-l mind1 at 38...
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A diffusive gradient in thin films (DGT) technique, based on a strongly basic anion exchange resin (Amberlite IRA-400), was successfully tested for 34S/32S analysis in labile soil sulfate. Separation of matrix elements (Na, K, and Ca) that potentially cause non-spectral interferences in 34S/32S analysis by MC ICP-MS (multi-collector inductively coupled plasma-mass spectrometry) during sampling ...
متن کاملEstimation of ergothioneine in urine, blood and organs by determination of the alkaline perhydrol-labile sulfur.
Behre and Benedict(1) developed a procedure for the determination of ergothioneine by its reaction with a phosphotungstic acid reagent, and Huntert(2) described a method based upon the reaction between the diazotized sulf anilic acid and ergothioneine. But these procedures seemed to be unsatisfactory, so in 1947 we devised a new methodt(3) based upon the conversion of the sulfur of ergothionein...
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The isolation and characterization of small sulfur allotropes have long remained unachievable because of their extreme lability. This study reports the first direct observation of disulfur (S2) with X-ray crystallography. Sulfur gas was kinetically trapped and frozen into the pores of two Cu-based porous coordination networks containing interactive iodide sites. Stabilization of S2 was achieved...
متن کاملSulfur-containing Proteins and Epidermal Keratinization
Sites of synthesis of sulfur-containing protein in keratinizing epithelium have been studied by radioautography after injection of sulfur-labeled cystine. Bern et al. (3) demonstrated concentration of silver grains immediately below the cornified layer, suggesting that much of sulfur is added at the final stages of keratinization as observed in hair. In contrast, B6langer (4) reported that prot...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1933
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)50225-8