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  • Title: Identification of a novel glutathione transferase in human skin homologous with class alpha glutathione transferase 2-2 in the rat.
    Author: Del Boccio G, Di Ilio C, Alin P, Jörnvall H, Mannervik B.
    Journal: Biochem J; 1987 May 15; 244(1):21-5. PubMed ID: 3117035.
    Abstract:
    Six forms of glutathione transferase with pI values of 4.6, 5.9, 6.8, 7.1, 8.5 and 9.9 have been isolated from the cytosol fraction of normal skin from three human subjects. The three most abundant enzymes were an acidic Class Pi transferase (pI 4.6; apparent subunit Mr 23,000), a basic Class Alpha transferase (pI 8.5; apparent subunit Mr 24,000) and an even more basic glutathione transferase of Class Alpha (pI 9.9; apparent subunit Mr 26,500). The last enzyme, which was previously unknown, accounts for 10-20% of the glutathione transferase in human skin. The novel transferase showed greater similarities with rat glutathione transferase 2-2, another Class Alpha enzyme, than with any other known transferase irrespective of species. The most striking similarities included reactions with antibodies, amino acid compositions and identical N-terminal amino acid sequences (16 residues). The close relationship between the human most basic and the rat glutathione transferase 2-2 supports the classification of the transferases previously proposed and indicates that the similarities between enzymes isolated from different species are more extensive than had been assumed previously.
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