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  • Title: An enzyme-linked immunoadsorbent assay for measuring cytochrome b5 and NADPH-cytochrome P-450 reductase in rat liver microsomal fractions. Evidence for functionally inactive protein.
    Author: Shawver LK, Seidel SL, Krieter PA, Shires TK.
    Journal: Biochem J; 1984 Feb 01; 217(3):623-32. PubMed ID: 6424647.
    Abstract:
    Immunoreactive cytochrome b5 and NADPH-cytochrome P-450 reductase (EC 1.6.2.4) from rat liver microsomal fractions were measured by using an enzyme-linked immunoadsorbent assay (e.l.i.s.a.) as a function of age, sex and type of inducer (phenobarbital or 3-methylcholanthrene), and the values were compared with those obtained by spectral measurement (for cytochrome b5) or enzymic assay (for reductase). In untreated animals, there was more cytochrome b5 and NADPH-cytochrome P-450 reductase when measured by an e.l.i.s.a. than was seen spectrally or enzymically. However, for microsomal preparations from phenobarbital-pretreated animals, spectrally obtained values for cytochrome b5 and immunoreactive-cytochrome b5 values were similar. Values from control animals suggest that there is about 20-30% more immunoreactive cytochrome b5 than that which is spectrally detectable.
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