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• W2057653796 abstract "A rapid, reproducible, and sensitive high-performance liquid chromatography (HPLC) method for the determination of the concentration of metallothionein-I (MT-I) and metallothionein-II (MT-II) in rat liver has been developed. Metallothioneins (MTs) were separated and quantitated by anion-exchange high-performance liquid chromatography coupled with atomic absorption spectrophotometry (AAS). Purified rat liver MT-I and MT-II, used as standards for developing the method, were easily resolved, eluting at 7.5 and 10.4 min, respectively. To establish standard curves, protein concentrations of solutions of the purified MTs were determined by the Kjeldahl method for the determination of nitrogen, after which the standards were saturated with Cd (final concentration of 50 ppm Cd). Rat liver cytosols obtained from untreated and Cd- or Zn-treated rats were prepared for HPLC-AAS analysis by saturation with Cd (50 ppm Cd) followed by heat denaturation (placing in a boiling water bath for 1 min). Based on the method of standard additions, recovery of MTs exceeded 95% and repeated injection of a sample yielded a coefficient of variance of approximately 2%. A detection limit of 5 μg MT/g liver was established for the method. Only MT-II was detected in untreated rats, whereas following exposure to Cd or Zn, both forms of MTs were detected. Concentrations of total MTs in liver of untreated and Cd- or Zn-treated rats were also determined by the Cd/hemoglobin radioassay (which fails to distinguish MT-I from MT-II) and indicated that results obtained with the HPLC-AAS method compared favorably to the Cd/hemoglobin radioassay. Thus, the HPLC-AAS method for quantitating MT-I and MT-II offers the advantage of determining the concentrations of both proteins in tissues and should be useful for studying the regulation of MT-I and MT-II." @default.
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• W2057653796 date "1986-03-01" @default.
• W2057653796 modified "2023-10-14" @default.
• W2057653796 title "Separation and quantitation of metallothioneins by high-performance liquid chromatography coupled with atomic absorption spectrophotometry" @default.
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• W2057653796 doi "https://doi.org/10.1016/0003-2697(86)90097-7" @default.
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