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The enzyme encoded by this gene catalyzes the transfer of the glutamyl moiety of glutathione to a variety of amino acids and dipeptide acceptors. The enzyme is composed of a heavy chain and a light chain, which are derived from a single precursor protein, and is present in tissues involved in absorption and secretion. This enzyme is a member of the gamma-glutamyltransferase protein family, of which many members have not yet been fully characterized and some of which may represent pseudogenes. This gene is classified as type I gamma-glutamyltransferase. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq]
![Enzyme Activity GGT1 [Unconjugated]](http://images.novusbio.com/fullsize/10977-gt_recombinant-human-ggt1-his-tag-protein-cf-enzyme-activity-7220221085.jpg)
![SDS-Page GGT1 [Unconjugated]](http://images.novusbio.com/fullsize/10977-gt_recombinant-human-ggt1-his-tag-protein-cf-sds-page-3011202111340.jpg)