Metallothionein-Null Mice Absorb Less Zn from an Egg-White Diet, but a Similar Amount from Solutions, although with Altered Intertissue Zn Distribution
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منابع مشابه
Zn-depleted mice absorb more of an intragastric Zn solution by a metallothionein-enhanced process than do Zn-replete mice.
The influence of metallothionein (MT)(2) on Zn absorption was investigated in MT-null (MT-/-) and normal (MT+/+) mice fed Zn-depleted (ZnD) diets for 7 d and compared with those fed Zn-replete (ZnR) diets in a previous study. Mice were starved for 20 h, then administered an oral gavage of aqueous (65)ZnSO(4) solution at doses of 154, 770 or 1540 nmol of Zn, and the amount transferred into nongu...
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Two groups of young gilthead sea bream were fed two different diets: a control diet containing Zn at 120 mg/kg feed and a supplemented diet containing Zn at 240 mg/kg feed. White portions of lateral muscle were analyzed for Zn and Cu concentrations, myofibrillar composition and pyruvate kinase (PK) activity in order to determine the influence of Zn on these biochemical parameters during the gro...
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Homeostatic mechanisms preventing the toxicity of free Zn ions in cells involve, among others, cytosolic Zn-binding ligands, particularly the cysteine-rich metallothioneins (MTs). Here we examined the Zn-binding peptides of Russula atropurpurea, an ectomycorrhizal fungus known for its ability to accumulate high amounts of Zn in its sporocarps. The Zn complexes and their peptide ligands were cha...
متن کاملCharacterization of calf liver Cu,Zn-metallothionein: naturally variable Cu and Zn stoichiometries.
Cu,Zn-metallothioneins were purified from bovine calf liver in order to examine the stoichiometry of metal binding to the protein. Copper and zinc analyses were carried out by atomic absorption spectrophotometry. Consistent quantitative thiolate analyses were obtained spectrophotometrically with Ellman's reagent and amperometrically with phenylmercuric acetate. These were used to define protein...
متن کاملSOME Zn−1 TERRACES FROM Zn POWER-SEQUENCES, n BEING AN ODD PRIME POWER
A terrace for Zm is a particular type of sequence formed from the m elements of Zm. For m odd, many procedures are available for constructing power-sequence terraces for Zm; each terrace of this sort may be partitioned into segments, of which one contains merely the zero element of Zm, whereas every other segment is either a sequence of successive powers of an element of Zm or such a sequence m...
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ژورنال
عنوان ژورنال: The Journal of Nutrition
سال: 1999
ISSN: 0022-3166,1541-6100
DOI: 10.1093/jn/129.2.372