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. 1986 May 1;235(3):741–745. doi: 10.1042/bj2350741

Two distinct forms of glutathione transferase from human foetal liver. Purification and comparison with isoenzymes isolated from adult liver and placenta.

C Guthenberg, M Warholm, A Rane, B Mannervik
PMCID: PMC1146750  PMID: 3092805

Abstract

Isoelectric focusing of a cytosol fraction from human foetal liver revealed the existence of an acidic and a basic isoenzyme of GSH transferase. The acidic and basic forms of GSH transferase were purified in good yield by use of ion-exchange chromatography on DEAE-cellulose followed by affinity chromatography on S-hexyl-GSH coupled to epoxy-activated Sepharose 6B. The content of the acidic and the basic isoenzymes of GSH transferase together was calculated to constitute 1-2% of the soluble proteins in the hepatic cytoplasm. Physical, catalytic and immunological analyses of the acidic and the basic isoenzymes from foetal liver demonstrated unambiguously that the two forms are different structures with distinct properties. On the other hand, the results show clearly extensive similarities between the foetal acidic transferase and transferase pi from human placenta as well as between the foetal basic form and the basic isoenzymes isolated from adult liver. An exception is that both foetal enzymes seem to be considerably more efficient in catalysing the conjugation of GSH with styrene 7,8-epoxide than the corresponding adult forms of GSH transferase.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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