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  • Title: The flavin-containing monooxygenase expressed in pig liver: primary sequence, distribution, and evidence for a single gene.
    Author: Gasser R, Tynes RE, Lawton MP, Korsmeyer KK, Ziegler DM, Philpot RM.
    Journal: Biochemistry; 1990 Jan 09; 29(1):119-24. PubMed ID: 2322534.
    Abstract:
    The primary sequence of the flavin-containing monooxygenase expressed in pig liver has been derived from the nucleotide sequence of cloned cDNA. The derived sequence is composed of 532 amino acids and represents a protein having a molecular weight of 58,952. The complete sequence was obtained from a single clone containing 2070 bases. A second clone, obtained from an independent library, yielded an identical sequence for the 1374 bases present. The amino acid composition compiled from the derived sequence is very similar to that obtained previously from the purified protein. In addition, a 10 amino acid sequence in a peptide formed from the purified protein by digestion with V8 protease exactly matches the derived sequence for residues 309-318. The flavin-containing monooxygenase expressed in pig liver is also expressed in pig lung and kidney as determined by analysis of both microsomal proteins and mRNA. The ratio of mRNA to protein for the enzyme in kidney is about 5 times greater than the same ratio for liver and about twice the ratio for lung. The reasons for these differences are not understood. Southern analysis of genomic DNA indicates that there is a single gene encoding the flavin-containing monooxygenase expressed in pig liver. Therefore, the broad activity of this enzyme in liver appears to be the result of the catalytic diversity of a single protein.
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