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  • Title: Complete primary structure of the transacylase (E2b) subunit of the human branched chain alpha-keto acid dehydrogenase complex.
    Author: Nobukuni Y, Mitsubuchi H, Endo F, Matsuda I.
    Journal: Biochem Biophys Res Commun; 1989 Jun 30; 161(3):1035-41. PubMed ID: 2742576.
    Abstract:
    We isolated from a placental cDNA library by immunoscreening a cDNA clone encoding the transacylase (E2b) precursor of the human branched chain alpha-keto acid dehydrogenase (BCKDH) complex. The cDNA insert consists of 2,649 base pairs with an open reading frame of 1,431 base pairs which can be translated into 477 amino acids and a 3'-untranslated region of 1,205 base pairs. The deduced amino acid sequence includes a leader peptide of 56 amino acid residues, a lipoyl-bearing domain, a E3-binding domain and an inner core domain. A mature human E2b subunit is likely to contain 421 amino acid residues with a calculated Mr 46,322. The nucleotide sequence of the open reading frame and the deduced amino acid sequence of the human E2b shows 91.6% and 92.0% homology with those of the bovine E2b subunit, respectively.
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