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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Isolation, partial purification, and characterization of the cytochrome P-450-dependent monooxygenase system from the midgut of the earthworm Lumbricus terrestris.

1. Cytochrome P-450 was purified from microsomes of the midgut of the earthworm Lumbricus terrestris up to a maximal specific content of 5.5 nmol P-450/mg protein. 2. At least 3 different cytochromes P-450 with apparent molecular weights of 48,000, 51,000 and 53,000 were identified by SDS-PAGE. 3. Western blot analysis with various polyclonal antibodies did not show structural epitopes common to the cytochromes P-450 of rodents or yeast and L. terrestris. 4. The microsomes contained about 43 pmol P-450/mg protein corresponding to 0.51 nmol P-450/g midgut and 64 pmol P-450/g body weight, respectively, and converted benzyloxyresorufin into resorufin with a Vmax of 2.12 pmol resorufin/min.mg protein and a Km of 770 nM benzyloxyresorufin at 25 degrees C, pH 8. 0. 5. The microsomes exhibited a NADPH-cytochrome P-450 reductase activity of 9.4 nmol cytochrome c/min.mg protein. 6. The apparent molecular weight of the threefold-purified reductase was 63,000.[1]

References

  1. Isolation, partial purification, and characterization of the cytochrome P-450-dependent monooxygenase system from the midgut of the earthworm Lumbricus terrestris. Berghout, A.G., Wenzel, E., Büld, J., Netter, K.J. Comp. Biochem. Physiol. C, Comp. Pharmacol. Toxicol. (1991) [Pubmed]
 
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